Dapoxetine for the treatment of premature ejaculation: results from a randomized, double-blind, placebo-controlled phase 3 trial in 22 countries

Eur Urol. 2009 Apr;55(4):957-67. doi: 10.1016/j.eururo.2009.01.025. Epub 2009 Jan 21.

Abstract

Background: Dapoxetine is being developed for the on-demand treatment of premature ejaculation (PE). Previous clinical trials have demonstrated its safety and efficacy.

Objective: To evaluate the long-term efficacy and safety of dapoxetine in men with PE.

Design, setting, and participants: This randomized, double-blind, parallel-group, placebo-controlled, phase 3 trial, conducted in 22 countries, enrolled men (N=1162) > or = 18 yr of age who met the Diagnostic and Statistical Manual of Mental Disorders, fourth edition, text revision criteria for PE for > or = 6 mo, with an intravaginal ejaculatory latency time (IELT) < or = 2 min in > or = 75% of intercourse episodes at baseline.

Intervention: Dapoxetine 30 mg or dapoxetine 60 mg or placebo on demand (1-3 h before intercourse) for 24 wk.

Measurements: Stopwatch-measured IELT, Premature Ejaculation Profile (PEP), Clinical Global Impression (CGI) of change, adverse events (AEs).

Results and limitations: The study was completed by 618 men. Mean average IELT increased from 0.9 min at baseline (all groups) to 1.9 min, 3.2 min, and 3.5 min with placebo and dapoxetine 30 mg and dapoxetine 60 mg, respectively, at study end point; geometric mean IELT increased from 0.7 min at baseline to 1.1 min, 1.8 min, and 2.3 min, respectively, at study end point. All PEP measures and IELTs improved significantly with dapoxetine versus placebo at week 12 and week 24 (p<0.001 for all). The most common AEs were nausea, dizziness, diarrhea, and headache. AEs led to discontinuation in 1.3%, 3.9%, and 8.2% of subjects with placebo and dapoxetine 30 mg and dapoxetine 60 mg, respectively. Limitations of this study included the exclusion of men who were not in long-term monogamous relationships.

Conclusions: Dapoxetine significantly improved all aspects of PE and was generally well tolerated in this broad population.

Trial registration: ClinicalTrials.gov NCT00229073.

Publication types

  • Clinical Trial, Phase III
  • Multicenter Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Benzylamines / adverse effects
  • Benzylamines / therapeutic use*
  • Double-Blind Method
  • Ejaculation*
  • Humans
  • Male
  • Naphthalenes / adverse effects
  • Naphthalenes / therapeutic use*
  • Serotonin Uptake Inhibitors / adverse effects
  • Serotonin Uptake Inhibitors / therapeutic use*
  • Sexual Dysfunction, Physiological / drug therapy*

Substances

  • Benzylamines
  • Naphthalenes
  • Serotonin Uptake Inhibitors
  • dapoxetine

Associated data

  • ClinicalTrials.gov/NCT00229073