Safety and Efficacy Evaluation Of Pregabalin (Lyrica) With Patients With Generalized Anxiety Disorder

Sponsor

Pfizer's Upjohn has merged with Mylan to form Viatris Inc. (Industry)

Overall Status

Completed

CT.gov ID

NCT00624780

Collaborator

(none)

615

Enrollment

Locations

Arms

Duration (Months)

10.8

Patients Per Site

0.3

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

The purpose of this study is to characterize the safety and efficacy in patients with generalized anxiety disorder after short- (3 months) and long-term (6 months) use of Pregabalin (Lyrica).

Condition or Disease	Intervention/Treatment	Phase
Generalized Anxiety Disorder	Drug: Pregabalin Drug: Lorazepam Drug: Pregabalin Drug: Placebo	Phase 4

Study Design

Study Type:

Interventional

Actual Enrollment :

615 participants

Allocation:

Randomized

Intervention Model:

Parallel Assignment

Masking:

Double (Participant, Investigator)

Primary Purpose:

Treatment

Official Title:

Long Term Safety And Efficacy Study Of Pregabalin (Lyrica) In Subjects With Generalized Anxiety Disorder

Study Start Date :

May 1, 2009

Actual Primary Completion Date :

Apr 1, 2012

Actual Study Completion Date :

Apr 1, 2012

Arms and Interventions

Arm	Intervention/Treatment
Experimental: 1	Drug: Pregabalin Pregabalin 150-300 mg given twice a day Other Names: Lyrica
Active Comparator: 2	Drug: Lorazepam Lorazepam 3-4 mg given twice a day
Experimental: 3	Drug: Pregabalin Pregabalin 450-600 mg given twice a day Other Names: Lyrica
Placebo Comparator: 4	Drug: Placebo Placebo

Outcome Measures

Primary Outcome Measures

Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 [Baseline, Week 1 post-treatment discontinuation (discontinuation occurred prior to Week 9)]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 2 [Baseline, Week 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 [Baseline, Week 1 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) at Discontinuation Week 2 [Baseline, Week 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 [Baseline, Week 1 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 3 (6-Month Last Visit) at Discontinuation Week 2 [Baseline, Week 2 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); possible range 0 to 56. Lower score indicates less affected.
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 [Last visit on treatment, Week 1 post-treatment discontinuation (discontinuation occurred prior to Week 9)]
PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 2 [Last visit on treatment, Week 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)]
PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 [Last visit on treatment, Week 1 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)]
PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) at Discontinuation Week 2 [Last visit on treatment, Week 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)]
PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 [Last visit on treatment, Week 1 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)]
PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) at Discontinuation Week 2 [Last visit on treatment, Week 2 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)]
PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.

Secondary Outcome Measures

Number of Participants With Rebound Anxiety for Cohort 1 (Less Than 3-Month Last Visit) [2 weeks post-treatment discontinuation (discontinuation occurred prior to Week 9)]
Rebound anxiety was defined as a rapid return of the participant's original symptoms following drug discontinuation, that were worse compared to baseline. This was characterized by a HAM-A score at the Discontinuation Week 1 or Week 2 greater than or equal to the baseline value.
Number of Participants With Rebound Anxiety for Cohort 2 (3-Month Last Visit) [2 weeks post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)]
Rebound anxiety was defined as a rapid return of the participant's original symptoms following drug discontinuation, that were worse compared to baseline. This was characterized by a HAM-A score at the Discontinuation Week 1 or Week 2 greater than or equal to the baseline value.
Number of Participants With Rebound Anxiety for Cohort 3 (6-Month Last Visit) [2 weeks post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)]
Rebound anxiety was defined as a rapid return of the participant's original symptoms following drug discontinuation, that were worse compared to baseline. This was characterized by a HAM-A score at the Discontinuation Week 1 or Week 2 greater than or equal to the baseline value.
Number of Participants With Discontinuation-Emergent Signs and Symptoms (DESS) for Cohort 1 (Less Than 3-Month Last Visit) [2 weeks post-treatment discontinuation (discontinuation occurred prior to Week 9)]
DESS adverse events, a subset of Treatment Emergent Signs and Symptoms (TESS), were defined as those spontaneously reported adverse events that developed or existed prior to but worsened during Discontinuation Week 1 and 2.
Number of Participants With Discontinuation-Emergent Signs and Symptoms (DESS) for Cohort 2 (3-Month Last Visit) [2 weeks post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)]
DESS adverse events, a subset of Treatment Emergent Signs and Symptoms (TESS), were defined as those spontaneously reported adverse events that developed or existed prior to but worsened during Discontinuation Week 1 and 2.
Number of Participants With Discontinuation-Emergent Signs and Symptoms (DESS) for Cohort 3 (6-Month Last Visit) [2 weeks post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)]
DESS adverse events, a subset of Treatment Emergent Signs and Symptoms (TESS), were defined as those spontaneously reported adverse events that developed or existed prior to but worsened during Discontinuation Week 1 and 2.
Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 and 2 [Baseline, Week 1, 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)]
PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 and 2 [Baseline, Week 1, 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)]
PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 and 2 [Baseline, Week 1, 2 post-treatment discontinuation (discontinuation [DC] occurred after Week 15 to Week 24)]
PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) [Week 1, 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)]
PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) [Week 1, 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)]
PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) [Week 1, 2 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)]
PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 and 2 [Last visit on treatment, Week 1, 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 and 2 [Last visit on treatment, Week 1, 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); possible range 0 to 56. Lower score indicates less affected.
Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 and 2 [Last visit on treatment, Week 1, 2 post-treatment discontinuation (discontinuation [DC] occurred after Week 15 to Week 24)]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) [Week 1, 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) [Week 1, 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); possible range 0 to 56. Lower score indicates less affected.
Hamilton Anxiety Scale (HAM-A) Score for Cohort 3 (6-Month Last Visit) [Week 1, 2 post-treatment discontinuation (discontinuation [DC] occurred after Week 15 to Week 24)]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Hamilton Anxiety Scale (HAM-A) Score for Period 1 [Baseline, Week 12]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Hamilton Anxiety Scale (HAM-A) Score for Period 2 [Baseline, Week 24]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Change From Baseline in Hamilton Anxiety Scale (HAM-A) Score at Week 12 [Baseline, Week 12]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Change From Baseline in Hamilton Anxiety Scale (HAM-A) Score at Week 24 [Baseline, Week 24]
HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Clinical Global Impression - Severity (CGI-S) Score for Period 1 [Baseline, Week 12]
CGI-S: 7-point clinician rated scale to assess severity of participant's current illness state; range: 1 (normal - not ill at all) to 7 (among the most extremely ill patients). Higher score = more affected.
Clinical Global Impression - Severity (CGI-S) Score for Period 2 [Baseline, Week 24]
CGI-S: 7-point clinician rated scale to assess severity of participant's current illness state; range: 1 (normal - not ill at all) to 7 (among the most extremely ill patients). Higher score = more affected
Change From Baseline in Clinical Global Impression - Severity (CGI-S) Score at Week 12 [Baseline, Week 12]
CGI-S: 7-point clinician rated scale to assess severity of participant's current illness state; range: 1 (normal - not ill at all) to 7 (among the most extremely ill patients). Higher score = more affected.
Change From Baseline in Clinical Global Impression - Severity (CGI-S) Score at Week 24 [Baseline, Week 24]
CGI-S: 7-point clinician rated scale to assess severity of participant's current illness state; range: 1 (normal - not ill at all) to 7 (among the most extremely ill patients). Higher score = more affected
Clinical Global Impression - Improvement (CGI-I) Score at the End of Period 1 [Week 12]
CGI-I: 7-point clinician rated scale ranging from 1 (very much improved) to 7 (very much worse). Improvement is defined as a score of 1 (very much improved), 2 (much improved), or 3 (minimally improved) on the scale.
Clinical Global Impression - Improvement (CGI-I) Score at the End of Period 2 [Week 24]
CGI-I: 7-point clinician rated scale ranging from 1 (very much improved) to 7 (very much worse). Improvement is defined as a score of 1 (very much improved), 2 (much improved), or 3 (minimally improved) on the scale.

Other Outcome Measures

Sheehan-Suicidality Tracking Scale (S-STS) Score [Baseline up to Week 24]
Sheehan-Suicidality Tracking Scale (S-STS): an 8-item prospective rating scale that tracked treatment-emergent suicidal ideation and behaviors. Items 1a, 2-6, 7a, and 8 were scored on a 5-point Likert scale (ranging from 0= not at all to 4=extremely). Items 1, 1b, and 7 required yes or no responses. Total score ranged from 0 to 35, higher score indicated higher suicidal tendency.
Number of Participants With Treatment-Emergent Adverse Events (AEs) [Baseline up to Week 12 (period 1), Week 13 up to Week 24 (period 2)]
An AE was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. Treatment-emergent are events between first dose of study drug and Week 12, for period 1, and between Week 13 and Week 24, for period 2, that were absent before treatment or that worsened relative to pretreatment state.

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years to 65 Years

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Inclusion Criteria:

Diagnosis Generalized Anxiety Disorder
HAM-A score >=18 and HAM-D (item 1) score >=2 at screening and baseline
Needs pharmacological treatment

Exclusion Criteria:

Current or past diagnosis of any other DSM IV Axis I disorders
A history of failed treatment with a benzodiazepine
Any clinically significant, serious, or unstable hematologic, autoimmune, endocrine, cardiovascular, renal, hepatic, gastrointestinal, or neurological disorder

Contacts and Locations

Locations

	Site	City	State	Country	Postal Code
1	Pfizer Investigational Site	La Plata	Buenos Aires	Argentina	B1904ADM
2	Pfizer Investigational Site	Lanus	Prov. De Buenos Aires	Argentina	B1824IBR
3	Pfizer Investigational Site	Buenos Aires		Argentina	C1115AAJ
4	Pfizer Investigational Site	Buenos Aires		Argentina	C1405BOA
5	Pfizer Investigational Site	Buenos Aires		Argentina	C1428AQK
6	Pfizer Investigational Site	Wien		Austria	A-1010
7	Pfizer Investigational Site	Wien		Austria	A-1090
8	Pfizer Investigational Site	San Jose		Costa Rica	00000
9	Pfizer Investigational Site	San Jose		Costa Rica
10	Pfizer Investigational Site	Rijeka		Croatia	51000
11	Pfizer Investigational Site	Split		Croatia	21000
12	Pfizer Investigational Site	Zagreb		Croatia	10000
13	Pfizer Investigational Site	Brno		Czechia	602 00
14	Pfizer Investigational Site	Ceske Budejovice		Czechia	370 87
15	Pfizer Investigational Site	Litomerice		Czechia	412 01
16	Pfizer Investigational Site	Lnare		Czechia	387 42
17	Pfizer Investigational Site	Melnik		Czechia	276 01
18	Pfizer Investigational Site	Praha 10- Strasnice		Czechia	10000
19	Pfizer Investigational Site	Praha 2		Czechia	120 00
20	Pfizer Investigational Site	Praha 6		Czechia	160 00
21	Pfizer Investigational Site	Strakonice		Czechia	386 01
22	Pfizer Investigational Site	Espoo		Finland	02650
23	Pfizer Investigational Site	HUS		Finland	00029
24	Pfizer Investigational Site	Joensuu		Finland	80100
25	Pfizer Investigational Site	Kuopio		Finland	70110
26	Pfizer Investigational Site	Seinajoki		Finland	60100
27	Pfizer Investigational Site	Turku		Finland	20100
28	Pfizer Investigational Site	Athens		Greece	11528
29	Pfizer Investigational Site	Ellisbridge	Ahmedabad	India	380 006
30	Pfizer Investigational Site	Tirupati	Andhra Pradesh	India	517 507
31	Pfizer Investigational Site	Mangalore	Karnataka	India	575001
32	Pfizer Investigational Site	Pune	Maharashtra	India	411 030
33	Pfizer Investigational Site	Chennai	Tamil Nadu	India	600 003
34	Pfizer Investigational Site	Denpasar	Bali	Indonesia
35	Pfizer Investigational Site	Jakarta	Jakarta Selatan	Indonesia
36	Pfizer Investigational Site	Jakarta Selatan	Jakarta	Indonesia	10430
37	Pfizer Investigational Site	Surabaya		Indonesia
38	Pfizer Investigational Site	Kaunas		Lithuania	50185
39	Pfizer Investigational Site	Kaunas		Lithuania	50425
40	Pfizer Investigational Site	Klaipeda		Lithuania	94231
41	Pfizer Investigational Site	Vilnius		Lithuania	09112
42	Pfizer Investigational Site	Acapulco	Guerrero	Mexico	39670
43	Pfizer Investigational Site	Zapopan	Jalisco	Mexico	45170
44	Pfizer Investigational Site	Mexico D.F.		Mexico	14269
45	Pfizer Investigational Site	Khotkovo, Moscow Region		Russian Federation	142601
46	Pfizer Investigational Site	Moscow		Russian Federation	107076
47	Pfizer Investigational Site	Moscow		Russian Federation	115522
48	Pfizer Investigational Site	Moscow		Russian Federation	119021
49	Pfizer Investigational Site	Moscow		Russian Federation	125367
50	Pfizer Investigational Site	St. Petersburg		Russian Federation	192019
51	Pfizer Investigational Site	Belgrade		Serbia	11000
52	Pfizer Investigational Site	Kragujevac		Serbia	34000
53	Pfizer Investigational Site	Ljubljana		Slovenia
54	Pfizer Investigational Site	Langreo	Asturias	Spain	33900
55	Pfizer Investigational Site	Zamora		Spain	49021
56	Pfizer Investigational Site	Istanbul		Turkey	34203
57	Pfizer Investigational Site	Kocaeli		Turkey	41380

Sponsors and Collaborators

Pfizer's Upjohn has merged with Mylan to form Viatris Inc.

Investigators

Study Director: Pfizer CT.gov Call Center, Pfizer

Study Documents (Full-Text)

None provided.

More Information

Additional Information:

To obtain contact information for a study center near you, click here.

Publications

None provided.

Responsible Party:

Pfizer's Upjohn has merged with Mylan to form Viatris Inc.

ClinicalTrials.gov Identifier:

NCT00624780

Other Study ID Numbers:

A0081147

First Posted:

Feb 27, 2008

Last Update Posted:

Jan 28, 2021

Last Verified:

Sep 1, 2012

Additional relevant MeSH terms:

Anxiety Disorders

Pregabalin

Lorazepam

Study Results

Participant Flow

Recruitment Details
Pre-assignment Detail	This study employed 3 treatments in Period 1 and 6 treatments in Period 2. Randomization occurred once, at the onset of Period 1.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Period Title: Treatment Optimization (Up to Week 12)
STARTED	154	52	154	52	153	50
COMPLETED	121	39	112	38	114	39
NOT COMPLETED	33	13	42	14	39	11
Period Title: Treatment Optimization (Up to Week 12)
STARTED	121	39	112	38	114	39
COMPLETED	106	28	94	27	95	30
NOT COMPLETED	15	11	18	11	19	9
Period Title: Treatment Optimization (Up to Week 12)
STARTED	106	28	94	27	95	30
COMPLETED	104	28	91	26	95	29
NOT COMPLETED	2	0	3	1	0	1
Period Title: Treatment Optimization (Up to Week 12)
STARTED	104	28	91	26	95	29
COMPLETED	102	27	89	26	93	29
NOT COMPLETED	2	1	2	0	2	0

Baseline Characteristics

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo	Total
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Total of all reporting groups
Overall Participants	154	52	154	52	153	50	615
Age, Customized (participants) [Number]
18 to 44 years	75 48.7%	30 57.7%	100 64.9%	28 53.8%	86 56.2%	27 54%	346 56.3%
45 to 64 years	79 51.3%	22 42.3%	51 33.1%	24 46.2%	66 43.1%	23 46%	265 43.1%
Greater than or equal to 65 years	0 0%	0 0%	3 1.9%	0 0%	1 0.7%	0 0%	4 0.7%
Sex: Female, Male (Count of Participants)
Female	89 57.8%	30 57.7%	101 65.6%	32 61.5%	95 62.1%	27 54%	374 60.8%
Male	65 42.2%	22 42.3%	53 34.4%	20 38.5%	58 37.9%	23 46%	241 39.2%

Outcome Measures

1. Primary Outcome

Title	Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Baseline, Week 1 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included. n=participants evaluable at given time points for each group.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	15	19	21
Baseline (n=15,19,21)	25.8 (4.23)	24.9 (4.15)	24.4 (4.88)
Change at Discontinuation Week 1 (n=15,19,18)	-7.7 (6.75)	-5.9 (7.20)	-9.9 (10.81)

2. Primary Outcome

Title	Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 2
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Baseline, Week 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. Here, 'N' (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	14	15	16
Mean (Standard Deviation) [units on a scale]	-12.0 (7.24)	-5.9 (5.46)	-9.7 (11.08)

3. Primary Outcome

Title	Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Baseline, Week 1 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	58	52	52
Baseline	25.0 (5.37)	24.7 (3.89)	24.6 (4.76)
Change at Discontinuation Week 1	-15.3 (7.76)	-15.3 (6.71)	-15.8 (7.92)

4. Primary Outcome

Title	Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) at Discontinuation Week 2
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Baseline, Week 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	54	49	44
Mean (Standard Deviation) [units on a scale]	-15.6 (7.42)	-14.9 (7.11)	-16.0 (7.96)

5. Primary Outcome

Title	Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Baseline, Week 1 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included in Month 6 last visit analysis.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	109	30	94	29	100	30
Baseline	25.5 (3.85)	24.2 (4.64)	24.7 (3.85)	24.9 (3.82)	24.6 (4.36)	24.9 (3.93)
Change at Discontinuation Week 1	-17.6 (7.25)	-18.7 (5.36)	-18.4 (6.33)	-16.5 (7.25)	-16.2 (8.11)	-19.1 (6.69)

6. Primary Outcome

Title	Change From Baseline in Hamilton Anxiety Scale (HAM-A) for Cohort 3 (6-Month Last Visit) at Discontinuation Week 2
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); possible range 0 to 56. Lower score indicates less affected.
Time Frame	Baseline, Week 2 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included in Month 6 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	107	29	84	26	94	30
Mean (Standard Deviation) [units on a scale]	-16.6 (8.53)	-19.1 (5.80)	-18.3 (7.05)	-16.0 (8.17)	-16.7 (7.52)	-18.7 (7.38)

7. Primary Outcome

Title	Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1
Description	PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Time Frame	Last visit on treatment, Week 1 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	15	18	20
Last visit on treatment (n=15,18,20)	10.1 (8.72)	16.8 (13.20)	13.1 (10.75)
Change at Discontinuation Week 1 (n=15,18,18)	0.1 (9.89)	-2.8 (7.99)	-4.2 (6.12)

8. Primary Outcome

Title	Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 2
Description	PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Time Frame	Last visit on treatment, Week 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants evaluable for this measure.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	14	15	16
Mean (Standard Deviation) [units on a scale]	-2.0 (6.39)	-2.7 (9.04)	-3.2 (6.05)

9. Primary Outcome

Title	Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1
Description	PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Time Frame	Last visit on treatment, Week 1 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	58	52	50
Last visit on treatment	7.2 (7.32)	6.5 (6.01)	5.0 (3.80)
Change at Discontinuation Week 1	1.9 (7.29)	1.4 (4.52)	2.3 (6.60)

10. Primary Outcome

Title	Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) at Discontinuation Week 2
Description	PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Time Frame	Last visit on treatment, Week 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	54	49	44
Mean (Standard Deviation) [units on a scale]	2.1 (6.11)	2.0 (5.51)	1.6 (6.33)

11. Primary Outcome

Title	Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1
Description	PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Time Frame	Last visit on treatment, Week 1 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included in Month 6 last visit analysis. Here, 'N' (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	109	30	93	29	100	30
Last visit on treatment	5.2 (5.62)	4.9 (7.15)	3.9 (4.14)	6.5 (6.72)	5.3 (6.65)	4.7 (4.50)
Change at Discontinuation Week 1	1.7 (4.92)	0.0 (2.18)	1.1 (3.50)	1.0 (4.37)	3.0 (6.79)	-0.1 (3.22)

12. Primary Outcome

Title	Change From Last Visit on Treatment in Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) at Discontinuation Week 2
Description	PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Time Frame	Last visit on treatment, Week 2 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included in Month 6 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	106	29	84	26	93	30
Mean (Standard Deviation) [units on a scale]	2.8 (5.99)	-1.0 (5.65)	1.7 (4.78)	1.8 (5.14)	2.2 (6.02)	-0.1 (3.63)

13. Secondary Outcome

Title	Number of Participants With Rebound Anxiety for Cohort 1 (Less Than 3-Month Last Visit)
Description	Rebound anxiety was defined as a rapid return of the participant's original symptoms following drug discontinuation, that were worse compared to baseline. This was characterized by a HAM-A score at the Discontinuation Week 1 or Week 2 greater than or equal to the baseline value.
Time Frame	2 weeks post-treatment discontinuation (discontinuation occurred prior to Week 9)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	15	19	18
Number [participants]	1 0.6%	5 9.6%	1 0.6%

14. Secondary Outcome

Title	Number of Participants With Rebound Anxiety for Cohort 2 (3-Month Last Visit)
Description	Rebound anxiety was defined as a rapid return of the participant's original symptoms following drug discontinuation, that were worse compared to baseline. This was characterized by a HAM-A score at the Discontinuation Week 1 or Week 2 greater than or equal to the baseline value.
Time Frame	2 weeks post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	58	52	48
Number [participants]	3 1.9%	1 1.9%	2 1.3%

15. Secondary Outcome

Title	Number of Participants With Rebound Anxiety for Cohort 3 (6-Month Last Visit)
Description	Rebound anxiety was defined as a rapid return of the participant's original symptoms following drug discontinuation, that were worse compared to baseline. This was characterized by a HAM-A score at the Discontinuation Week 1 or Week 2 greater than or equal to the baseline value.
Time Frame	2 weeks post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included in Month 6 last visit analysis. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	109	30	94	28	100	30
Number [participants]	4 2.6%	0 0%	0 0%	1 1.9%	6 3.9%	0 0%

16. Secondary Outcome

Title	Number of Participants With Discontinuation-Emergent Signs and Symptoms (DESS) for Cohort 1 (Less Than 3-Month Last Visit)
Description	DESS adverse events, a subset of Treatment Emergent Signs and Symptoms (TESS), were defined as those spontaneously reported adverse events that developed or existed prior to but worsened during Discontinuation Week 1 and 2.
Time Frame	2 weeks post-treatment discontinuation (discontinuation occurred prior to Week 9)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	15	19	21
Newly developed DESS	6 3.9%	0 0%	3 1.9%
Worsened DESS	0 0%	0 0%	0 0%

17. Secondary Outcome

Title	Number of Participants With Discontinuation-Emergent Signs and Symptoms (DESS) for Cohort 2 (3-Month Last Visit)
Description	DESS adverse events, a subset of Treatment Emergent Signs and Symptoms (TESS), were defined as those spontaneously reported adverse events that developed or existed prior to but worsened during Discontinuation Week 1 and 2.
Time Frame	2 weeks post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 1: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	58	52	52
Newly developed DESS	40 26%	38 73.1%	36 23.4%
Worsened DESS	1 0.6%	2 3.8%	1 0.6%

18. Secondary Outcome

Title	Number of Participants With Discontinuation-Emergent Signs and Symptoms (DESS) for Cohort 3 (6-Month Last Visit)
Description	DESS adverse events, a subset of Treatment Emergent Signs and Symptoms (TESS), were defined as those spontaneously reported adverse events that developed or existed prior to but worsened during Discontinuation Week 1 and 2.
Time Frame	2 weeks post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included in Month 6 last visit analysis.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	109	30	94	29	100	30
Newly developed DESS	78 50.6%	5 9.6%	35 22.7%	17 32.7%	50 32.7%	7 14%
Worsened DESS	2 1.3%	0 0%	2 1.3%	1 1.9%	5 3.3%	0 0%

19. Secondary Outcome

Title	Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 and 2
Description	PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Time Frame	Baseline, Week 1, 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	14	19	21
Baseline (n=14,19,21)	13.6 (8.19)	17.6 (10.68)	16.4 (8.62)
Change at Discontinuation Week 1 (n=14,19,18)	-3.4 (11.91)	-3.3 (9.12)	-5.9 (7.43)
Change at Discontinuation Week 2 (n=13,15,16)	-4.7 (10.62)	-2.7 (8.20)	-5.4 (8.34)

20. Secondary Outcome

Title	Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 and 2
Description	PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Time Frame	Baseline, Week 1, 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	57	51	52
Baseline (n=57,51,52)	17.4 (7.81)	17.1 (9.84)	14.8 (7.86)
Change at Discontinuation Week 1 (n=57,51,49)	-8.5 (9.40)	-9.3 (9.48)	-7.6 (9.53)
Change at Discontinuation Week 2 (n=53,48,44)	-8.3 (9.53)	-8.7 (9.68)	-8.0 (9.70)

21. Secondary Outcome

Title	Change From Baseline in Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 and 2
Description	PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Time Frame	Baseline, Week 1, 2 post-treatment discontinuation (discontinuation [DC] occurred after Week 15 to Week 24)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n'=participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	109	30	94	29	99	30
Baseline (n=109,30,94,29,99,30)	17.8 (8.36)	17.8 (7.79)	16.1 (7.52)	17.4 (9.28)	16.8 (8.85)	14.9 (7.61)
Change at DC Week 1 (n=109,30,94,29,99,30)	-11.0 (9.48)	-12.9 (7.89)	-11.0 (8.08)	-9.9 (10.98)	-8.7 (10.77)	-10.4 (7.58)
Change at DC Week 2 (n=106,29,84,26,92,30)	-9.8 (10.32)	-13.8 (8.32)	-10.8 (8.42)	-10.2 (8.56)	-9.6 (9.70)	-10.3 (7.50)

22. Secondary Outcome

Title	Physician's Withdrawal Checklist (PWC) Score for Cohort 1 (Less Than 3-Month Last Visit)
Description	PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Time Frame	Week 1, 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	15	19	18
Discontinuation Week 1 (n=15,19,18)	10.2 (7.97)	14.3 (10.04)	9.1 (9.25)
Discontinuation Week 2 (n=14,15,16)	8.2 (6.70)	14.1 (9.16)	10.6 (9.39)

23. Secondary Outcome

Title	Physician's Withdrawal Checklist (PWC) Score for Cohort 2 (3-Month Last Visit)
Description	PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Time Frame	Week 1, 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	58	52	49
Discontinuation Week 1 (n=58,52,49)	9.1 (6.82)	8.0 (6.19)	7.3 (6.69)
Discontinuation Week 2 (n=54,49,44)	8.9 (7.28)	8.3 (6.32)	6.9 (6.38)

24. Secondary Outcome

Title	Physician's Withdrawal Checklist (PWC) Score for Cohort 3 (6-Month Last Visit)
Description	PWC: 20 item physician rated interview measuring anxiolytic drug withdrawal-related signs and symptoms (gastrointestinal, mood, sleep, motor, somatic, perception and cognition); range 0 (not present) to 3 (severe); total score range: 0 to 60; higher score = more affected.
Time Frame	Week 1, 2 post-treatment discontinuation (discontinuation occurred after Week 15 to Week 24)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	109	30	94	29	99	30
Discontinuation Week 1 (n=109,30,94,29,99,30)	6.8 (6.56)	4.9 (5.73)	5.1 (4.45)	7.4 (6.43)	8.0 (7.45)	4.6 (4.22)
Discontinuation Week 2 (n=106,29,84,26,93,30)	7.9 (7.59)	4.1 (4.17)	5.7 (6.11)	7.1 (8.65)	7.1 (6.64)	4.6 (4.67)

25. Secondary Outcome

Title	Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit) at Discontinuation Week 1 and 2
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Last visit on treatment, Week 1, 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	15	18	20
Last visit on treatment (n=15,18,20)	16.1 (8.46)	21.6 (6.18)	16.1 (10.11)
Change at Discontinuation Week 1 (n=15,18,18)	2.0 (11.45)	-2.3 (4.63)	-2.4 (3.31)
Change at Discontinuation Week 2 (n=14,15,16)	-2.3 (9.47)	-3.5 (5.34)	-2.2 (4.18)

26. Secondary Outcome

Title	Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit) at Discontinuation Week 1 and 2
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); possible range 0 to 56. Lower score indicates less affected.
Time Frame	Last visit on treatment, Week 1, 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	58	52	50
Last visit on treatment (n=58,52,50)	8.0 (6.57)	8.5 (6.50)	6.7 (4.29)
Change at Discontinuation Week 1 (n=58,52,48)	1.7 (6.69)	0.9 (4.03)	2.3 (5.74)
Change at Discontinuation Week 2 (n=54,49,44)	1.5 (5.55)	1.5 (6.43)	1.5 (5.37)

27. Secondary Outcome

Title	Change From Last Visit of Treatment in Hamilton Anxiety Scale (HAM-A) for Cohort 3 (6-Month Last Visit) at Discontinuation Week 1 and 2
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Last visit on treatment, Week 1, 2 post-treatment discontinuation (discontinuation [DC] occurred after Week 15 to Week 24)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included. N(Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	109	30	93	29	100	30
Last visit on treatment (n=109,30,93,29,100,30)	6.3 (5.89)	5.5 (6.12)	5.6 (5.02)	8.3 (6.49)	5.6 (6.17)	5.5 (4.66)
Change at DC Week 1 (n=109,30,93,28,99,30)	1.6 (4.37)	-0.0 (2.30)	0.7 (3.08)	0.6 (2.69)	3.0 (5.73)	0.3 (3.01)
Change at DC Week 2 (n=107,29,84,26,94,30)	2.5 (5.74)	-0.8 (5.33)	1.2 (3.90)	1.5 (5.08)	2.2 (5.39)	0.6 (3.76)

28. Secondary Outcome

Title	Hamilton Anxiety Scale (HAM-A) for Cohort 1 (Less Than 3-Month Last Visit)
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Week 1, 2 post-treatment discontinuation (discontinuation occurred prior to Week 9)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 1: Participants who discontinued study prior to Week 9 and had at least 1 discontinuation assessment were included in less-than Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	15	19	18
Discontinuation Week 1 (n=15,19,18)	18.1 (7.11)	19.0 (7.61)	14.1 (10.31)
Discontinuation Week 2 (n=14,15,16)	13.9 (7.33)	18.6 (6.15)	14.6 (10.41)

29. Secondary Outcome

Title	Hamilton Anxiety Scale (HAM-A) for Cohort 2 (3-Month Last Visit)
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); possible range 0 to 56. Lower score indicates less affected.
Time Frame	Week 1, 2 post-treatment discontinuation (discontinuation occurred from Week 9 to Week 15)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 2: Participants who discontinued study from Week 9 to Week 15 and had at least 1 discontinuation assessment were included in Month 3 last visit analysis. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	58	52	48
Discontinuation Week 1 (n=58,52,48)	9.6 (6.38)	9.4 (6.60)	8.8 (5.88)
Discontinuation Week 2 (n=54,49,44)	9.0 (6.44)	9.9 (7.04)	8.3 (6.48)

30. Secondary Outcome

Title	Hamilton Anxiety Scale (HAM-A) Score for Cohort 3 (6-Month Last Visit)
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Week 1, 2 post-treatment discontinuation (discontinuation [DC] occurred after Week 15 to Week 24)

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set. Cohort 3: Participants who discontinued study after Week 15 or completed Week 24 visit and had at least 1 discontinuation assessment were included. N (Number of Participants Analyzed) = participants evaluable for this measure. 'n' = participants evaluable at given time points for each group respectively.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	109	30	94	28	99	30
Discontinuation Week 1 (n=109,30,94,28,99,30)	7.9 (6.34)	5.5 (4.85)	6.3 (5.48)	8.4 (6.67)	8.4 (7.07)	7.07 (4.92)
Discontinuation Week 2 (n=107,29,84,26,94,30)	8.9 (7.60)	5.0 (4.32)	6.5 (6.36)	9.2 (8.28)	7.9 (6.27)	6.1 (6.00)

31. Secondary Outcome

Title	Hamilton Anxiety Scale (HAM-A) Score for Period 1
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Baseline, Week 12

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. Last observation carried forward (LOCF) method was used to impute missing values.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	197	183	188
Baseline	25.3 (4.39)	24.9 (3.87)	24.5 (4.39)
Week 12	8.0 (6.23)	8.9 (7.19)	7.9 (6.70)

32. Secondary Outcome

Title	Hamilton Anxiety Scale (HAM-A) Score for Period 2
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Baseline, Week 24

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	117	37	103	37	106	37
Baseline	25.6 (3.82)	24.6 (4.66)	24.8 (3.77)	25.1 (3.92)	24.7 (4.41)	24.1 (4.03)
Week 24	7.0 (6.53)	7.1 (7.09)	6.5 (5.98)	10.2 (7.49)	5.7 (6.06)	6.6 (6.33)

33. Secondary Outcome

Title	Change From Baseline in Hamilton Anxiety Scale (HAM-A) Score at Week 12
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Baseline, Week 12

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values. Here, N (Number of Participants Analyzed) signifies those participants who were evaluable for this measure.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	194	180	185
Mean (Standard Deviation) [units on a scale]	-17.4 (7.39)	-16.0 (7.45)	-16.7 (7.92)

34. Secondary Outcome

Title	Change From Baseline in Hamilton Anxiety Scale (HAM-A) Score at Week 24
Description	HAM-A measures treatment-related changes in generalized anxiety symptoms; 14 item questionnaire scored 0 (not present) to 4 (very severe); total possible range 0 to 56. Lower score indicates less affected.
Time Frame	Baseline, Week 24

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	117	37	103	37	106	37
Mean (Standard Deviation) [units on a scale]	-18.7 (7.33)	-17.5 (6.89)	-18.2 (6.59)	-14.9 (7.85)	-19.0 (7.24)	-17.5 (8.34)

35. Secondary Outcome

Title	Clinical Global Impression - Severity (CGI-S) Score for Period 1
Description	CGI-S: 7-point clinician rated scale to assess severity of participant's current illness state; range: 1 (normal - not ill at all) to 7 (among the most extremely ill patients). Higher score = more affected.
Time Frame	Baseline, Week 12

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	197	183	188
Baseline	4.6 (0.68)	4.5 (0.71)	4.4 (0.65)
Week 12	2.3 (1.06)	2.5 (1.17)	2.3 (1.00)

36. Secondary Outcome

Title	Clinical Global Impression - Severity (CGI-S) Score for Period 2
Description	CGI-S: 7-point clinician rated scale to assess severity of participant's current illness state; range: 1 (normal - not ill at all) to 7 (among the most extremely ill patients). Higher score = more affected
Time Frame	Baseline, Week 24

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	117	37	103	37	106	37
Baseline	4.7 (0.65)	4.5 (0.69)	4.5 (0.71)	4.5 (0.73)	4.4 (0.68)	4.5 (0.56)
Week 24	2.3 (1.08)	2.2 (1.16)	2.1 (0.97)	2.5 (1.24)	1.9 (0.90)	2.4 (0.98)

37. Secondary Outcome

Title	Change From Baseline in Clinical Global Impression - Severity (CGI-S) Score at Week 12
Description	CGI-S: 7-point clinician rated scale to assess severity of participant's current illness state; range: 1 (normal - not ill at all) to 7 (among the most extremely ill patients). Higher score = more affected.
Time Frame	Baseline, Week 12

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. Here, 'N' (Number of Participants Analyzed) signifies those participants who were evaluable for this measure. LOCF method was used to impute missing values.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	195	181	186
Mean (Standard Deviation) [units on a scale]	-2.3 (1.13)	-2.1 (1.13)	-2.1 (1.17)

38. Secondary Outcome

Title	Change From Baseline in Clinical Global Impression - Severity (CGI-S) Score at Week 24
Description	CGI-S: 7-point clinician rated scale to assess severity of participant's current illness state; range: 1 (normal - not ill at all) to 7 (among the most extremely ill patients). Higher score = more affected
Time Frame	Baseline, Week 24

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	117	37	103	37	106	37
Mean (Standard Deviation) [units on a scale]	-2.4 (1.13)	-2.3 (1.24)	-2.4 (1.04)	-2.0 (1.27)	-2.5 (1.11)	-2.2 (1.17)

39. Secondary Outcome

Title	Clinical Global Impression - Improvement (CGI-I) Score at the End of Period 1
Description	CGI-I: 7-point clinician rated scale ranging from 1 (very much improved) to 7 (very much worse). Improvement is defined as a score of 1 (very much improved), 2 (much improved), or 3 (minimally improved) on the scale.
Time Frame	Week 12

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	197	183	188
Mean (Standard Deviation) [units on a scale]	1.9 (1.13)	1.9 (1.01)	1.9 (1.17)

40. Secondary Outcome

Title	Clinical Global Impression - Improvement (CGI-I) Score at the End of Period 2
Description	CGI-I: 7-point clinician rated scale ranging from 1 (very much improved) to 7 (very much worse). Improvement is defined as a score of 1 (very much improved), 2 (much improved), or 3 (minimally improved) on the scale.
Time Frame	Week 24

Outcome Measure Data

Analysis Population Description
Per-protocol analysis set: all randomized participants who had baseline with at least 1 discontinuation or efficacy visit, and were not major protocol violators. LOCF method was used to impute missing values.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	117	37	103	37	106	37
Mean (Standard Deviation) [units on a scale]	1.7 (0.99)	1.9 (1.15)	1.6 (0.75)	2.3 (1.53)	1.5 (0.91)	2.0 (1.07)

41. Other Pre-specified Outcome

Title	Sheehan-Suicidality Tracking Scale (S-STS) Score
Description	Sheehan-Suicidality Tracking Scale (S-STS): an 8-item prospective rating scale that tracked treatment-emergent suicidal ideation and behaviors. Items 1a, 2-6, 7a, and 8 were scored on a 5-point Likert scale (ranging from 0= not at all to 4=extremely). Items 1, 1b, and 7 required yes or no responses. Total score ranged from 0 to 35, higher score indicated higher suicidal tendency.
Time Frame	Baseline up to Week 24

Outcome Measure Data

Analysis Population Description
Data was not statistically summarized but was available in individual participant listings and mapped to Columbia Classification Algorithm of Suicide Assessment (C-CASA) due to change in planned analysis.

Arm/Group Title	Pregabalin High Dose	Pregabalin Low Dose	Lorazepam
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12.	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12.
Measure Participants	0	0	0

42. Other Pre-specified Outcome

Title	Number of Participants With Treatment-Emergent Adverse Events (AEs)
Description	An AE was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. Treatment-emergent are events between first dose of study drug and Week 12, for period 1, and between Week 13 and Week 24, for period 2, that were absent before treatment or that worsened relative to pretreatment state.
Time Frame	Baseline up to Week 12 (period 1), Week 13 up to Week 24 (period 2)

Outcome Measure Data

Analysis Population Description
Safety analysis set: all randomized participants who received at least 1 dose of study medication. Here, 'n' signifies those participants who were evaluable for this measure during each specified period, for each group respectively.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose	Pregabalin High Dose, Placebo	Pregabalin Low Dose, Pregabalin Low Dose	Pregabalin Low Dose, Placebo	Lorazepam, Lorazepam	Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6 fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).	Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
Measure Participants	154	52	154	52	153	50
Period 1 (n=154,52,154,52,153,50)	103 66.9%	37 71.2%	100 64.9%	40 76.9%	95 62.1%	35 70%
Period 2 (n=121,39,112,38,114,39)	62 40.3%	26 50%	62 40.3%	18 34.6%	52 34%	20 40%

Adverse Events

	Pregabalin High Dose, Pregabalin High Dose		Pregabalin High Dose, Placebo		Pregabalin Low Dose, Pregabalin Low Dose		Pregabalin Low Dose, Placebo		Lorazepam, Lorazepam		Lorazepam, Placebo
Time Frame
Adverse Event Reporting Description	The same event may appear as both an AE and a SAE. However, what is presented are distinct events. An event may be categorized as serious in one subject and as nonserious in another subject, or one subject may have experienced both a serious and nonserious event during the study.

Arm/Group Title	Pregabalin High Dose, Pregabalin High Dose		Pregabalin High Dose, Placebo		Pregabalin Low Dose, Pregabalin Low Dose		Pregabalin Low Dose, Placebo		Lorazepam, Lorazepam		Lorazepam, Placebo
Arm/Group Description	Period 1 (treatment optimization): Pregabalin capsule 150 milligram per day (mg/day) orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).		Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses in Week 1, pregabalin capsule 300 mg/day orally twice daily in 2 equally divided doses in Week 2 and pregabalin capsule 450 mg/day orally twice daily in 2 equally divided doses in Week 3 during 3-week upward titration. Flexible dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 450 mg/day or 600 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).		Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Continued pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).		Period 1 (treatment optimization): Pregabalin capsule 150 mg/day orally twice daily in 2 equally divided doses during 3-week upward titration. Flexible dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of pregabalin capsule 150 mg/day or 300 mg/day orally twice daily in 2 equally divided doses up to Week 12. Period 2 (fixed dosing): Pregabalin was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).		Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Continued lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 24. Period 3 (treatment discontinuation): A 1-week blinded dose tapering period (Week 25). Participants were followed-up after 1 week (Week 26).		Period 1 (treatment optimization): Lorazepam capsule 2 mg/day orally twice daily in 2 equally divided doses in Week 1, lorazepam capsule 3 mg/day orally in 2 divided doses (1 mg in morning, 2 mg at night) in Week 2 and 3, during 3-week upward titration. Flexible dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) depending on efficacy and tolerability up to Week 6. If participant had an adequate response at Week 6, fixed dosing of lorazepam capsule 3 or 4 mg/day orally twice daily in 2 divided doses (1 or 2 mg in morning, 2 mg at night) up to Week 12. Period 2 (fixed dosing): Lorazepam was discontinued with a blinded dose tapering over 1-week followed by matching placebo capsule orally twice daily up to Week 24. Period 3 (treatment discontinuation): Continued matching placebo capsule orally twice daily for 1 week (Week 25). Participants were followed-up after 1 week (Week 26).
All Cause Mortality
	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events
Total	/ (NaN)		/ (NaN)		/ (NaN)		/ (NaN)		/ (NaN)		/ (NaN)
Serious Adverse Events
	Pregabalin High Dose, Pregabalin High Dose		Pregabalin High Dose, Placebo		Pregabalin Low Dose, Pregabalin Low Dose		Pregabalin Low Dose, Placebo		Lorazepam, Lorazepam		Lorazepam, Placebo
	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events
Total	2/154 (1.3%)		0/52 (0%)		5/154 (3.2%)		2/52 (3.8%)		4/153 (2.6%)		0/50 (0%)
Cardiac disorders
Myocardial infarction	0/154 (0%)		0/52 (0%)		0/154 (0%)		0/52 (0%)		1/153 (0.7%)		0/50 (0%)
Myocardial ischaemia	0/154 (0%)		0/52 (0%)		0/154 (0%)		0/52 (0%)		1/153 (0.7%)		0/50 (0%)
Gastrointestinal disorders
Abdominal hernia	0/154 (0%)		0/52 (0%)		0/154 (0%)		1/52 (1.9%)		0/153 (0%)		0/50 (0%)
Food poisoning	0/154 (0%)		0/52 (0%)		0/154 (0%)		0/52 (0%)		1/153 (0.7%)		0/50 (0%)
Inguinal hernia	0/154 (0%)		0/52 (0%)		1/154 (0.6%)		0/52 (0%)		0/153 (0%)		0/50 (0%)
Infections and infestations
Infection	0/154 (0%)		0/52 (0%)		1/154 (0.6%)		0/52 (0%)		0/153 (0%)		0/50 (0%)
Typhoid fever	0/154 (0%)		0/52 (0%)		0/154 (0%)		0/52 (0%)		1/153 (0.7%)		0/50 (0%)
Injury, poisoning and procedural complications
Subdural haematoma	1/154 (0.6%)		0/52 (0%)		0/154 (0%)		0/52 (0%)		0/153 (0%)		0/50 (0%)
Metabolism and nutrition disorders
Diabetes mellitus inadequate control	0/154 (0%)		0/52 (0%)		0/154 (0%)		1/52 (1.9%)		0/153 (0%)		0/50 (0%)
Hyperglycaemia	0/154 (0%)		0/52 (0%)		0/154 (0%)		1/52 (1.9%)		0/153 (0%)		0/50 (0%)
Ketoacidosis	0/154 (0%)		0/52 (0%)		0/154 (0%)		1/52 (1.9%)		0/153 (0%)		0/50 (0%)
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
Metastasis	0/154 (0%)		0/52 (0%)		1/154 (0.6%)		0/52 (0%)		0/153 (0%)		0/50 (0%)
Nervous system disorders
Cerebral haemorrhage	0/154 (0%)		0/52 (0%)		1/154 (0.6%)		0/52 (0%)		0/153 (0%)		0/50 (0%)
Psychiatric disorders
Anxiety	1/154 (0.6%)		0/52 (0%)		0/154 (0%)		0/52 (0%)		0/153 (0%)		0/50 (0%)
Depression	0/154 (0%)		0/52 (0%)		1/154 (0.6%)		0/52 (0%)		0/153 (0%)		0/50 (0%)
Generalised anxiety disorder	0/154 (0%)		0/52 (0%)		1/154 (0.6%)		0/52 (0%)		1/153 (0.7%)		0/50 (0%)
Suicidal ideation	0/154 (0%)		0/52 (0%)		1/154 (0.6%)		0/52 (0%)		0/153 (0%)		0/50 (0%)
Other (Not Including Serious) Adverse Events
	Pregabalin High Dose, Pregabalin High Dose		Pregabalin High Dose, Placebo		Pregabalin Low Dose, Pregabalin Low Dose		Pregabalin Low Dose, Placebo		Lorazepam, Lorazepam		Lorazepam, Placebo
	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events
Total	110/154 (71.4%)		40/52 (76.9%)		108/154 (70.1%)		38/52 (73.1%)		100/153 (65.4%)		35/50 (70%)
Ear and labyrinth disorders
Vertigo	4/154 (2.6%)		1/52 (1.9%)		5/154 (3.2%)		4/52 (7.7%)		3/153 (2%)		1/50 (2%)
Gastrointestinal disorders
Abdominal pain	1/154 (0.6%)		1/52 (1.9%)		2/154 (1.3%)		3/52 (5.8%)		1/153 (0.7%)		0/50 (0%)
Constipation	10/154 (6.5%)		1/52 (1.9%)		4/154 (2.6%)		2/52 (3.8%)		2/153 (1.3%)		1/50 (2%)
Diarrhoea	10/154 (6.5%)		3/52 (5.8%)		8/154 (5.2%)		5/52 (9.6%)		9/153 (5.9%)		1/50 (2%)
Dry mouth	13/154 (8.4%)		3/52 (5.8%)		5/154 (3.2%)		2/52 (3.8%)		8/153 (5.2%)		4/50 (8%)
Nausea	17/154 (11%)		7/52 (13.5%)		12/154 (7.8%)		8/52 (15.4%)		18/153 (11.8%)		7/50 (14%)
General disorders
Fatigue	16/154 (10.4%)		6/52 (11.5%)		15/154 (9.7%)		11/52 (21.2%)		15/153 (9.8%)		5/50 (10%)
Irritability	6/154 (3.9%)		1/52 (1.9%)		4/154 (2.6%)		2/52 (3.8%)		8/153 (5.2%)		1/50 (2%)
Infections and infestations
Influenza	8/154 (5.2%)		3/52 (5.8%)		7/154 (4.5%)		0/52 (0%)		7/153 (4.6%)		0/50 (0%)
Nasopharyngitis	13/154 (8.4%)		2/52 (3.8%)		7/154 (4.5%)		5/52 (9.6%)		8/153 (5.2%)		4/50 (8%)
Investigations
Weight increased	5/154 (3.2%)		1/52 (1.9%)		7/154 (4.5%)		3/52 (5.8%)		4/153 (2.6%)		0/50 (0%)
Metabolism and nutrition disorders
Decreased appetite	6/154 (3.9%)		1/52 (1.9%)		3/154 (1.9%)		4/52 (7.7%)		6/153 (3.9%)		3/50 (6%)
Musculoskeletal and connective tissue disorders
Arthralgia	4/154 (2.6%)		1/52 (1.9%)		3/154 (1.9%)		0/52 (0%)		3/153 (2%)		3/50 (6%)
Back pain	9/154 (5.8%)		1/52 (1.9%)		1/154 (0.6%)		0/52 (0%)		4/153 (2.6%)		2/50 (4%)
Myalgia	5/154 (3.2%)		4/52 (7.7%)		4/154 (2.6%)		2/52 (3.8%)		9/153 (5.9%)		1/50 (2%)
Nervous system disorders
Disturbance in attention	12/154 (7.8%)		1/52 (1.9%)		3/154 (1.9%)		2/52 (3.8%)		6/153 (3.9%)		1/50 (2%)
Dizziness	37/154 (24%)		17/52 (32.7%)		28/154 (18.2%)		14/52 (26.9%)		20/153 (13.1%)		10/50 (20%)
Headache	38/154 (24.7%)		13/52 (25%)		36/154 (23.4%)		17/52 (32.7%)		33/153 (21.6%)		10/50 (20%)
Paraesthesia	6/154 (3.9%)		0/52 (0%)		3/154 (1.9%)		3/52 (5.8%)		5/153 (3.3%)		2/50 (4%)
Sedation	6/154 (3.9%)		2/52 (3.8%)		5/154 (3.2%)		0/52 (0%)		10/153 (6.5%)		1/50 (2%)
Somnolence	25/154 (16.2%)		7/52 (13.5%)		31/154 (20.1%)		9/52 (17.3%)		35/153 (22.9%)		13/50 (26%)
Tremor	5/154 (3.2%)		2/52 (3.8%)		1/154 (0.6%)		3/52 (5.8%)		6/153 (3.9%)		0/50 (0%)
Psychiatric disorders
Anxiety	14/154 (9.1%)		6/52 (11.5%)		10/154 (6.5%)		1/52 (1.9%)		19/153 (12.4%)		5/50 (10%)
Generalised anxiety disorder	4/154 (2.6%)		2/52 (3.8%)		9/154 (5.8%)		2/52 (3.8%)		6/153 (3.9%)		2/50 (4%)
Insomnia	31/154 (20.1%)		15/52 (28.8%)		24/154 (15.6%)		12/52 (23.1%)		23/153 (15%)		13/50 (26%)
Tension	8/154 (5.2%)		1/52 (1.9%)		4/154 (2.6%)		0/52 (0%)		2/153 (1.3%)		1/50 (2%)
Respiratory, thoracic and mediastinal disorders
Cough	1/154 (0.6%)		1/52 (1.9%)		2/154 (1.3%)		0/52 (0%)		2/153 (1.3%)		4/50 (8%)

Limitations/Caveats

[Not Specified]

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Principal Investigators are NOT employed by the organization sponsoring the study.

Pfizer has the right to review disclosures, requesting a delay of less than 60 days. Investigator will postpone single center publications until after disclosure of pooled data (all sites), less than 12 months from study completion/termination at all participating sites. Investigator may not disclose previously undisclosed confidential information other than study results.

Results Point of Contact

Name/Title	Pfizer ClinicalTrials.gov Call Center
Organization	Pfizer, Inc.
Phone	1-800-718-1021
Email	ClinicalTrials.gov_Inquiries@pfizer.com

Responsible Party:

Pfizer's Upjohn has merged with Mylan to form Viatris Inc.

ClinicalTrials.gov Identifier:

NCT00624780

Other Study ID Numbers:

A0081147

First Posted:

Feb 27, 2008

Last Update Posted:

Jan 28, 2021

Last Verified:

Sep 1, 2012

Safety and Efficacy Evaluation Of Pregabalin (Lyrica) With Patients With Generalized Anxiety Disorder

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