A Study of the Effectiveness and Safety of Dapoxetine in the Treatment of Men With Premature Ejaculation.

Sponsor

Alza Corporation, DE, USA (Industry)

Overall Status

Completed

CT.gov ID

NCT00211107

Collaborator

(none)

1,294

Enrollment

Duration (Months)

Study Details

Study Description

Brief Summary

The primary purpose of the study is to demonstrate that dapoxetine can prolong intravaginal ejaculatory latency time (IELT) compared with placebo in men with premature ejaculation (PE).

Condition or Disease	Intervention/Treatment	Phase
Ejaculation	Drug: Dapoxetine	Phase 3

Detailed Description

One form of male sexual dysfunction is premature ejaculation (PE), which is also referred to as rapid ejaculation (RE). An objective measurement of PE in clinical studies is the intravaginal ejaculatory latency time (IELT). This is a randomized, double-blind study in men with PE. The study consists of 2 phases: pre-randomization phase (a screening visit and a 2-week baseline period); 12-week double-blind treatment phase during which patients will receive dapoxetine at one of two dosages, or placebo, for use on an "as-needed" basis. The total duration of the study is approximately 14 weeks. Patients and their partners are expected to attempt sexual intercourse at least 4 times during the baseline period and at least 6 times each month during the treatment phase. Assessments of effectiveness include the average Intravaginal Ejaculatory Latency time (IELT), as measured by stopwatch, during sexual intercourse for the treatment period (12 weeks); control over ejaculation, satisfaction with sexual intercourse, and severity of symptoms, based on questions asked at monthly intervals through the treatment phase. Safety assessments include the incidence, severity, and type of adverse events throughout treatment (12 weeks), vital sign measurements (pulse and blood pressure) and laboratory tests (hematology, chemistry, urinalysis) at monthly intervals. The study hypothesis is that treatment for 12 weeks with dapoxetine prolongs intravaginal ejaculatory latency time, compared with placebo, in men with PE. Oral tablets of dapoxetine (30 milligrams[mg] or 60mg) taken as needed during 12 weeks of treatment. No more than one dose within a 24-hour period.

Study Design

Study Type:

Interventional

Actual Enrollment :

1294 participants

Allocation:

Randomized

Intervention Model:

Parallel Assignment

Masking:

Double

Primary Purpose:

Treatment

Official Title:

A Placebo-Controlled, Double-Blind, Randomized, Parallel Study Of The Efficacy And Safety Of Dapoxetine HCl In The Treatment Of Rapid Ejaculation

Study Start Date :

Jun 1, 2003

Actual Study Completion Date :

Jun 1, 2004

Outcome Measures

Primary Outcome Measures

Average intravaginal ejaculatory latency time (IELT), as measured by stopwatch during sexual intercourse, between last 2 visits during the treatment period []

Secondary Outcome Measures

Control over ejaculation, satisfaction with sexual intercourse, and severity of symptom impressions, based on questions asked at start of study and through Week 12; incidence, severity, and type of adverse events throughout study (12 weeks). []

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years and Older

Sexes Eligible for Study:

Male

Accepts Healthy Volunteers:

Inclusion Criteria:

Heterosexual male in a stable, monogamous, sexual relationship with a female partner for at least 6 months
onset of orgasm and ejaculation occurs with minimal sexual stimulation before or shortly after penetration and before the person wishes it
premature ejaculation (PE) in the majority of intercourse experiences in the 6 months before study initiation
intravaginal latency ejaculatory time (IELT) of <=2 minutes in at least 3 out of 4 events
participants with partners of child-bearing potential must consent to use a medically acceptable method of contraception throughout the entire study
participant's partner must have a negative pregnancy test at time of screening.

Exclusion Criteria:

History of surgery or injury to the pelvis or spinal cord, chronic inflammation of the prostate or urethra
taking medications that are contraindicated for participation in the study
currently using other forms of therapy for treatment of PE (for example, behavioral therapy or medications applied locally)
previously participated in a drug study involving dapoxetine or in another drug trial within the last month
taken pimozide, astemizole, or monoamine oxidase inhibitors within 6 months of the start of the study.