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A Study of Withdrawal Effects With Dapoxetine in the Treatment of Premature Ejaculation

This study has been completed.
Information provided by:
Johnson & Johnson Pharmaceutical Research & Development, L.L.C. Identifier:
First received: September 13, 2005
Last updated: June 6, 2011
Last verified: December 2010
The primary purpose of the study is to assess the possible withdrawal effects after abruptly stopping daily therapy with dapoxetine compared with continuing daily therapy in men with premature ejaculation (PE).

Condition Intervention Phase
Sexual Dysfunction Ejaculation Drug: Dapoxetine Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: A Placebo-Controlled, Double-Blind, Randomized, Parallel Study of the Withdrawal Effects of Chronic Daily and As-Needed Dosing With Dapoxetine in the Treatment of Premature Ejaculation

Further study details as provided by Johnson & Johnson Pharmaceutical Research & Development, L.L.C.:

Primary Outcome Measures:
  • Incidence of withdrawal symptoms (defined by a checklist of signs and symptoms associated with stopping the therapy) at Weeks 9, 10, and 11 of treatment

Secondary Outcome Measures:
  • Control over ejaculation, satisfaction with sexual intercourse, and severity of symptom impressions, based on questions asked at start of study through Week 11; adverse incidence and severity throughout study and follow up (Week 12)

Enrollment: 199
Study Start Date: November 2004
Study Completion Date: August 2005
Detailed Description:
Premature ejaculation (PE) is a form of male sexual dysfunction. A measure of withdrawal effects associated with stopping therapy for PE is the Discontinuation-Emergent Signs and Symptoms (DESS), a series of questions for signs and symptoms experienced by the patient. This study of men with PE is a multicenter, randomized, double-blind trial consisting of 3 phases: pre-randomization phase (a screening visit and 1-week baseline period); 10-week double-blind treatment phase during which patients receive dapoxetine or placebo; and 2-week follow-up phase. The total duration of the study is approximately 13 weeks. During the double-blind phase patients receive study medication for once daily treatment and for use on as "as-needed" basis prior to sexual activity. After 9 weeks, some patients (half of the active patients) continue treatment with dapoxetine and other (another half of the active patients) are switched to placebo for the last week of therapy, abruptly stopping the study drug. Assessments of effectiveness include the incidence of withdrawal symptoms, assessed by changes in DESS; control over ejaculation, satisfaction with sexual intercourse, and severity of symptom impressions, based on questions asked at specified intervals during the study. Safety assessments include the incidence, severity, and type of adverse events throughout the study, as well as laboratory tests and questionnaires to monitor sexual function at specified times during the study.The study hypothesis is that abruptly stopping treatment with dapoxetine in men with PE does not result in an increase in withdrawal symptoms (as assessed by DESS), compared with the men who stay with the treatment. Oral tablets of dapoxetine (60 milligrams) taken once daily and also as needed during 10 weeks of treatment. No more than 1 tablet for daily treatment and 1 as-needed tablet within a 24-hour period.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patient is in a stable, monogamous sexual relationship with the same woman for at least 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 and Statistical Manual of Mental Disorders (DSM-IV-TR) for at least 6 months before study initiation
  • experience PE in the majority of sexual intercourse events
  • good general health at study initiation
  • patient and partner willing to avoid situations or activities that may have an effect o their sexual activity (for example, avoid pregnancy, refrain from any preplanned surgery)

Exclusion Criteria:

  • Not taken dapoxetine or participated in another study investigating pharmacologic treatment of PE within the last 3 months
  • no history of any medical events such as surgery, injury, infections, or neurological conditions that are associated with the development of PE
  • not taken an investigational drug within 1 month, or used an experimental medical device within 6 months, of study initiation
  • no positive diagnosis of depressive or anxiety disorder, manic episode, panic disorder, obsessive-compulsive disorder, posttraumatic stress disorder, alcohol abuse and dependence, schizophrenia, or other psychotic disorders
  • no known allergy or hypersensitivity to selective serotonin reuptake inhibitors (SSRIs) or serotonin norepinephrine reuptake inhibitors (SNRIs)
  Contacts and Locations
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Please refer to this study by its identifier: NCT00210613

Sponsors and Collaborators
Johnson & Johnson Pharmaceutical Research & Development, L.L.C.
Study Director: Johnson & Johnson Pharmaceutical Research & Development, L.L. C. Clinical Trial Johnson & Johnson Pharmaceutical Research & Development, L.L.C.
  More Information

Additional Information:
Publications automatically indexed to this study by Identifier (NCT Number): Identifier: NCT00210613     History of Changes
Other Study ID Numbers: CR003451
Study First Received: September 13, 2005
Last Updated: June 6, 2011

Keywords provided by Johnson & Johnson Pharmaceutical Research & Development, L.L.C.:
premature ejaculation
sexual dysfunction
orgasmic disorder
sexual intercourse

Additional relevant MeSH terms:
Premature Birth
Premature Ejaculation
Obstetric Labor, Premature
Obstetric Labor Complications
Pregnancy Complications
Sexual Dysfunction, Physiological
Genital Diseases, Male
Sexual Dysfunctions, Psychological
Mental Disorders processed this record on September 19, 2017