tap-oxy: Comparison of the Effects of Tapentadol and Oxycodone on Gastrointestinal and Colonic Transit in Humans
Study Details
Study Description
Brief Summary
Tapentadol is FDA approved for the treatment of moderate to severe acute pain. Due to the dual mechanism of action as an opioid agonist and norepinephrine reuptake inhibitor, there is potential for off label use in chronic pain.
Tapentadol is a new molecular entity that is structurally similar to tramadol. Tapentadol is a centrally-acting analgesic with a dual mode of action as an agonist at the mu-opioid receptor and as a norepinephrine reuptake inhibitor. These two actions are synergistic in pain relief. While its action reflects aspects of tramadol and morphine, its ability to control pain is more on the order of hydrocodone and oxycodone.
Its dual mode of action provides analgesia at similar levels of more potent narcotic analgesics such as hydrocodone, oxycodone, and meperidine with a more tolerable side effect profile. Clinical studies showed that tapentadol effectively relieves moderate to severe pain in various pain care settings. In addition, it was reported to be associated with significantly fewer treatment discontinuations due to a significantly lower incidence of gastrointestinal-related adverse events compared with equivalent doses of oxycodone. The combination of these reduced treatment discontinuation rates and tapentadol efficacy for the relief of moderate to severe nociceptive and neuropathic pain may offer an improvement in pain therapy by increasing patient compliance with their treatment regimen.
Condition or Disease | Intervention/Treatment | Phase |
---|---|---|
|
Phase 4 |
Detailed Description
Single center, parallel group, randomized controlled trial of tapentadol, oxycodone and placebo effects on gastrointestinal and colonic transit in healthy human volunteers
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
---|---|
Active Comparator: Tapentadol 75 mg tapentadol tid |
Drug: Tapentadol
Subjects received tapentadol immediate release formulation, 75 mg three times per day (tid) for 48 hours.
Other Names:
|
Active Comparator: Oxycodone 5 mg oxycodone tid |
Drug: Oxycodone
Subjects received oxycodone immediate release formulation, 5 mg three times per day (tid) for 48 hours.
Other Names:
|
Placebo Comparator: Placebo Placebo tid |
Drug: Placebo
Subjects received placebo three times per day (tid) for 48 hours.
|
Outcome Measures
Primary Outcome Measures
- Colonic Transit, Geometric Center at 24 Hours [24 hours]
The scintigraphic method is used to measure colonic transit. An isotope is adsorbed on activated charcoal particles and delivered to the colon in a delayed release capsule. Anterior and posterior gamma images are taken hourly. The geometric center (GC) is the weighted average of counts in the different colonic regions. The scale ranges from 1 to 5; a high GC implies faster colonic transit, a GC of 1 implies all isotope is in the ascending colon, and a GC of 5 implies all isotope is in the stool.
- Gastric Emptying Half-time (t1/2) at 24 Hours [24 hours]
Secondary Outcome Measures
- Colonic Geometric Center at 8 and 48 Hours [8 hours, 48 hours]
The scintigraphic method is used to measure colonic transit. An isotope is adsorbed on activated charcoal particles and delivered to the colon in a delayed release capsule. Anterior and posterior gamma images are taken hourly. The geometric center (GC) is the weighted average of counts in the different colonic regions. The scale ranges from 1 to 5; a high GC implies faster colonic transit, a GC of 1 implies all isotope is in the ascending colon, and a GC of 5 implies all isotope is in the stool.
- Colonic Filling at 6 Hours [6 hours]
Percent of the radio-labeled meal that reached the colon at 6 hours, indirectly reflecting small bowel transit time.
- Ascending Colon Emptying (AC t1/2) [Over the first 24 hours after ingestion of the radioisotopically labeled charcoal particles]
Ascending colon emptying t1/2 will be estimated by power exponential analysis of the proportionate emptying over time of counts from the colon. The primary data for this analysis will be the proportion of decay and depth-corrected counts in the ascending colon on the hourly scans on the first day of transit measurement and the 24 hour data.
Eligibility Criteria
Criteria
Healthy volunteers Inclusion criteria
-
Males and non-pregnant, non-breastfeeding females
-
18-65 years old
Exclusion criteria
-
Use of any mu-opioid agent in the last 3 months
-
Structural or metabolic diseases/conditions that affect the gastrointestinal system, or functional gastrointestinal disorders. For screening the shortened screening version of the Bowel Disease Questionnaire (Appendix) will be used to exclude subjects with dyspepsia, irritable bowel syndrome or significant gastrointestinal symptoms. Of 19 questions, participants have to have three or less positives to be eligible to participate.
-
Unable to withdraw medications 48 hours prior to the study :
-
Alter GI transit including laxatives, magnesium or aluminum-containing antacids, prokinetics, erythromycin, narcotics, anticholinergics, tricyclic antidepressants, selective serotonin re-uptake inhibitors (SSRIs) and newer antidepressants.
-
Analgesic drugs including opiates, nonsteroidal anti-inflammatory drugs (NSAIDs), COX 2 inhibitors
-
SSRI NOTE: Low stable doses of thyroid replacement, estrogen replacement, low dose aspirin for cardioprotection and birth control pills or depot injections are permissible.
-
Female subjects who are pregnant or breast feeding.
-
Clinical evidence (including physical exam, ECG, hemoglobin level and review of the medical history) of significant cardiovascular, respiratory, renal, hepatic, gastrointestinal, hematological, neurological, psychiatric, or other disease that interfere with the objectives of the study.
-
Subjects who are considered by the investigator to be alcoholics not in remission or known substance abusers.
-
Subjects who have participated in another clinical study within the past 30 days
-
History of porphyria, renal (creatinine > 1.5mg/dL) or significant liver impairment (transaminases, alkaline phosphatase of gamma-glutamyl transpeptidase (GGT) >2 times upper limit of normal)
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
---|---|---|---|---|---|
1 | Mayo Clinic in Rochester | Rochester | Minnesota | United States | 55905 |
Sponsors and Collaborators
- Mayo Clinic
- National Center for Research Resources (NCRR)
Investigators
- Principal Investigator: Michael Camilleri, MD, Mayo Clinic
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- 11-002334
- Pharmacodynamic study
- UL1RR024150
Study Results
Participant Flow
Recruitment Details | |
---|---|
Pre-assignment Detail |
Arm/Group Title | Tapentadol | Oxycodone | Placebo |
---|---|---|---|
Arm/Group Description | 75 mg tapentadol tid | 5 mg oxycodone tid | Placebo tid |
Period Title: Overall Study | |||
STARTED | 13 | 12 | 13 |
COMPLETED | 10 | 10 | 13 |
NOT COMPLETED | 3 | 2 | 0 |
Baseline Characteristics
Arm/Group Title | Tapentadol | Oxycodone | Placebo | Total |
---|---|---|---|---|
Arm/Group Description | 75 mg tapentadol tid | 5 mg oxycodone tid | Placebo tid | Total of all reporting groups |
Overall Participants | 13 | 12 | 13 | 38 |
Age (years) [Mean (Standard Deviation) ] | ||||
Mean (Standard Deviation) [years] |
34.99
(7.82)
|
33.26
(12.94)
|
39.48
(12)
|
35.98
(11.11)
|
Sex: Female, Male (Count of Participants) | ||||
Female |
9
69.2%
|
9
75%
|
10
76.9%
|
28
73.7%
|
Male |
4
30.8%
|
3
25%
|
3
23.1%
|
10
26.3%
|
Region of Enrollment (participants) [Number] | ||||
United States |
13
100%
|
12
100%
|
13
100%
|
38
100%
|
Body Mass Index (BMI) (kg/m^2) [Mean (Standard Deviation) ] | ||||
Mean (Standard Deviation) [kg/m^2] |
26.27
(4.88)
|
27.36
(6.11)
|
25.16
(4.88)
|
26.23
(5.23)
|
Outcome Measures
Title | Colonic Transit, Geometric Center at 24 Hours |
---|---|
Description | The scintigraphic method is used to measure colonic transit. An isotope is adsorbed on activated charcoal particles and delivered to the colon in a delayed release capsule. Anterior and posterior gamma images are taken hourly. The geometric center (GC) is the weighted average of counts in the different colonic regions. The scale ranges from 1 to 5; a high GC implies faster colonic transit, a GC of 1 implies all isotope is in the ascending colon, and a GC of 5 implies all isotope is in the stool. |
Time Frame | 24 hours |
Outcome Measure Data
Analysis Population Description |
---|
[Not Specified] |
Arm/Group Title | Tapentadol | Oxycodone | Placebo |
---|---|---|---|
Arm/Group Description | 75 mg tapentadol tid | 5 mg oxycodone tid | Placebo tid |
Measure Participants | 13 | 12 | 13 |
Mean (Standard Deviation) [units on a scale] |
2.06
(0.67)
|
2.07
(0.6)
|
2.17
(0.739)
|
Title | Colonic Geometric Center at 8 and 48 Hours |
---|---|
Description | The scintigraphic method is used to measure colonic transit. An isotope is adsorbed on activated charcoal particles and delivered to the colon in a delayed release capsule. Anterior and posterior gamma images are taken hourly. The geometric center (GC) is the weighted average of counts in the different colonic regions. The scale ranges from 1 to 5; a high GC implies faster colonic transit, a GC of 1 implies all isotope is in the ascending colon, and a GC of 5 implies all isotope is in the stool. |
Time Frame | 8 hours, 48 hours |
Outcome Measure Data
Analysis Population Description |
---|
[Not Specified] |
Arm/Group Title | Tapentadol | Oxycodone | Placebo |
---|---|---|---|
Arm/Group Description | 75 mg tapentadol tid | 5 mg oxycodone tid | Placebo tid |
Measure Participants | 13 | 12 | 13 |
Colonic geometric center at 8 hr |
0.78
(0.589)
|
0.75
(0.54)
|
0.79
(0.98)
|
Colonic geometric center at 48 hr |
3.59
(1.16)
|
3.51
(0.82)
|
3.742
(0.83)
|
Title | Gastric Emptying Half-time (t1/2) at 24 Hours |
---|---|
Description | |
Time Frame | 24 hours |
Outcome Measure Data
Analysis Population Description |
---|
[Not Specified] |
Arm/Group Title | Tapentadol | Oxycodone | Placebo |
---|---|---|---|
Arm/Group Description | 75 mg tapentadol tid | 5 mg oxycodone tid | Placebo tid |
Measure Participants | 13 | 12 | 13 |
Mean (Standard Deviation) [minutes] |
159.2
(46.45)
|
155.2
(38.44)
|
124.7
(39.08)
|
Title | Colonic Filling at 6 Hours |
---|---|
Description | Percent of the radio-labeled meal that reached the colon at 6 hours, indirectly reflecting small bowel transit time. |
Time Frame | 6 hours |
Outcome Measure Data
Analysis Population Description |
---|
[Not Specified] |
Arm/Group Title | Tapentadol | Oxycodone | Placebo |
---|---|---|---|
Arm/Group Description | 75 mg tapentadol tid | 5 mg oxycodone tid | Placebo tid |
Measure Participants | 13 | 12 | 13 |
Mean (Standard Deviation) [percentage of radio-labeled meal] |
35.55
(32.3)
|
38.6
(19.5)
|
65.54
(26.1)
|
Title | Ascending Colon Emptying (AC t1/2) |
---|---|
Description | Ascending colon emptying t1/2 will be estimated by power exponential analysis of the proportionate emptying over time of counts from the colon. The primary data for this analysis will be the proportion of decay and depth-corrected counts in the ascending colon on the hourly scans on the first day of transit measurement and the 24 hour data. |
Time Frame | Over the first 24 hours after ingestion of the radioisotopically labeled charcoal particles |
Outcome Measure Data
Analysis Population Description |
---|
[Not Specified] |
Arm/Group Title | Tapentadol | Oxycodone | Placebo |
---|---|---|---|
Arm/Group Description | 75 mg tapentadol tid | 5 mg oxycodone tid | Placebo tid |
Measure Participants | 13 | 12 | 13 |
Mean (Standard Deviation) [hours] |
21.92
(9.89)
|
19.3
(6.27)
|
17.88
(6.21)
|
Adverse Events
Time Frame | Adverse events were recorded during visits, and participants were contacted 5-7 days following the last dose of study medication to determine if any adverse events had occurred. | |||||
---|---|---|---|---|---|---|
Adverse Event Reporting Description | ||||||
Arm/Group Title | Tapentadol | Oxycodone | Placebo | |||
Arm/Group Description | 75 mg tapentadol tid | 5 mg oxycodone tid | Placebo tid | |||
All Cause Mortality |
||||||
Tapentadol | Oxycodone | Placebo | ||||
Affected / at Risk (%) | # Events | Affected / at Risk (%) | # Events | Affected / at Risk (%) | # Events | |
Total | / (NaN) | / (NaN) | / (NaN) | |||
Serious Adverse Events |
||||||
Tapentadol | Oxycodone | Placebo | ||||
Affected / at Risk (%) | # Events | Affected / at Risk (%) | # Events | Affected / at Risk (%) | # Events | |
Total | 0/13 (0%) | 0/12 (0%) | 0/13 (0%) | |||
Other (Not Including Serious) Adverse Events |
||||||
Tapentadol | Oxycodone | Placebo | ||||
Affected / at Risk (%) | # Events | Affected / at Risk (%) | # Events | Affected / at Risk (%) | # Events | |
Total | 10/13 (76.9%) | 4/12 (33.3%) | 1/13 (7.7%) | |||
Gastrointestinal disorders | ||||||
Nausea | 5/13 (38.5%) | 5 | 4/12 (33.3%) | 4 | 0/13 (0%) | 0 |
Vomiting | 3/13 (23.1%) | 3 | 1/12 (8.3%) | 1 | 0/13 (0%) | 0 |
Nervous system disorders | ||||||
Headache | 1/13 (7.7%) | 1 | 0/12 (0%) | 0 | 1/13 (7.7%) | 1 |
Dizziness | 5/13 (38.5%) | 5 | 0/12 (0%) | 0 | 0/13 (0%) | 0 |
Light-headed | 2/13 (15.4%) | 2 | 0/12 (0%) | 0 | 0/13 (0%) | 0 |
Limitations/Caveats
More Information
Certain Agreements
All Principal Investigators ARE employed by the organization sponsoring the study.
There is NOT an agreement between Principal Investigators and the Sponsor (or its agents) that restricts the PI's rights to discuss or publish trial results after the trial is completed.
Results Point of Contact
Name/Title | Dr. Michael Camilleri |
---|---|
Organization | Mayo Clinic |
Phone | 507-284-6218 |
camilleri.michael@mayo.edu |
- 11-002334
- Pharmacodynamic study
- UL1RR024150