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

Last updated: June 6, 2011
Sponsor: Johnson & Johnson Pharmaceutical Research & Development, L.L.C.
Overall Status: Completed

Phase

3

Condition

Infertility

Male Hormonal Deficiencies/abnormalities

Impotence

Treatment

N/A

Clinical Study ID

NCT00229073
CR004231
  • Ages > 18
  • Male

Study 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).

Eligibility Criteria

Inclusion

Inclusion Criteria:

  • Patient is in a stable, monogamous sexual relationship with the same woman for atleast 6 months and plans to maintain this relationship for the duration of the study

  • diagnosis of premature ejaculation (PE) according to the criteria of Diagnostic andStatistical Manual of Mental Disorders (DSM-IV-TR) for at least 6 months before studyinitiation

  • history of intravaginal ejaculatory latency time (IELT) of <2 minutes in at least 3out of 4 events

  • good general health

  • patient's partner must have a negative urine pregnancy test at time of screening

Exclusion

Exclusion Criteria:

  • Not taken dapoxetine or participated in another study investigating pharmacologictreatment of PE within the last 3 months

  • no history of any medical events that are associated with the development of PE

  • not taken another investigational drug within 1 month, or used an experimental medicaldevice within 6 months, of study initiation

  • no positive diagnosis of depressive or anxiety disorder, manic episode, panicdisorder, obsessive-compulsive disorder, posttraumatic stress disorder, alcohol abuseand dependence, schizophrenia, or other psychotic disorders

  • no known allergy or hypersensitivity to selective serotonin reuptake inhibitors (SSRIs) or serotonin norepinephrine reuptake inhibitors (SNRIs)

Study Design

Total Participants: 1116
Study Start date:
December 01, 2004
Estimated Completion Date:
October 31, 2006

Study Description

Premature ejaculation (PE) is a form of male sexual dysfunction. An objective measurement of PE in clinical studies is the intravaginal ejaculatory latency time (IELT). This is a multicenter, placebo-controlled, double-blind, randomized, parallel-group study in men with PE. The study will consist 3 phases: pre-randomization phase (a screening visit and a 4-week baseline period); 24-week double-blind treatment phase during which patients will receive dapoxetine or placebo for use on an "as-needed" basis; and, 1-week double-blind withdrawal phase (dapoxetine or placebo) with a post-study telephone contact approximately 2 weeks after the end of treatment. The total duration of the study is approximately 31 weeks. Assessments of effectiveness include the average intravaginal ejaculatory latency time, as measured by stopwatch during sexual intercourse, during the treatment period; 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 and follow up (Week 27), as well as laboratory tests and questionnaires to monitor possible changes in mood, anxiety, motor responses, and sexual function at specified times during the study. The study hypothesis is that treatment for 24 weeks with dapoxetine prolongs intravaginal ejaculatory latency time, compared with placebo, in men with PE. Oral tablets of dapoxetine (30 milligrams[mg] or 60mg) or placebo taken as needed during 24 weeks of treatment. No more than 1 dose within a 24-hour period.