The Asia-Pacific Flexible Dose Study of Dapoxetine and Patient Satisfaction in Premature Ejaculation Therapy

The purpose of the study is to measure the efficacy of flexible dosing of dapoxetine in a setting similar to routine clinical practice.

Study Overview

• Status: Completed
• Conditions: Sexual Dysfunction, Physiological
• Intervention / Treatment: Drug: Dapoxetine

Detailed Description

This is a prospective, interventional study to evaluate efficacy and safety of flexible dose dapoxetine as Premature Ejaculation (PE) Therapy. The total study duration will be 16 weeks, composed of a 2-week pretreatment phase and a 12-week open-label treatment phase, followed by a telephone contact two weeks after Week 12 to follow-up adverse events. At Visit 1 (Screening) standardized assessment tool or patient questionnaires will be used to determine which of those patients with erectile dysfunction/premature ejaculation are eligible to participate in this study. Once enrolled the patient and his partner are expected to attempt sexual intercourse a minimum of 2 times (at least 24 hours apart) and to complete a Baseline Event Log. Starting at Visit 2 (Baseline), the patient (and partner) will complete the Premature Ejaculation Profile (PEP) at the beginning of every treatment visit for the duration of the study. Patients will be started on study drug instructed to take 1 tablet of dapoxetine 30 mg, as needed, 1 to 3 hours prior to sexual activity. The need for adjustments in the dose of dapoxetine, as well as to assess the occurrence of adverse events and concomitant therapy use will be assessed approximately every 4 weeks. Patients will complete Treatment Event Logs during each dosing throughout the open-label treatment phase. Patients who have their dose increased to 60 mg, will be scheduled for a telephone consultation 1 week after to determine how the dose change is tolerated. At Visit 5 (Final Visit/Week 12/Early Termination), the patients and partners will complete several standardized assessment questionnaires have all final visit procedures performed and schedule a telephone follow up contact to evaluate any adverse events. The starting dose of dapoxetine is 30 mg (one 30-mg tablet), taken approximately 1 to 3 hours prior to sexual activity. The dose may be increased after 4 weeks to 60 mg taken. The maximum recommended dosing frequency is once every 24 hours.

• Study Type: Interventional
• Enrollment (Actual): 285
• Phase: Phase 3

Contacts and Locations

Study Locations

• Australia
  • Malvern, Australia
  • St Leonards, Australia
  • Sydney, Australia
• Korea, Republic of
  • Busan, Korea, Republic of
  • Daegu, Korea, Republic of
  • Gwangju, Korea, Republic of
  • Incheon, Korea, Republic of
  • Jeonju-Si, Korea, Republic of
  • Jinju-Si, Korea, Republic of
  • Seoul, Korea, Republic of
• Thailand
  • Bangkok, Thailand
  • Chiang Mai, Thailand

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Male

Description

Inclusion Criteria:

• Participants must be heterosexual males and in a stable monogamous, sexual relationship with a female partner for at least 6 months
• must score =11 in the Premature Ejaculation Diagnostic Tool (PEDT)
• Must have a self-estimated intravaginal ejaculatory latency time (IELT) of = 2 minutes
• Must have an International Index of Erectile Dysfunction (IIEF) score a total of > or = to 21 in 6 questions from the IIEF used to assess for the absence of moderate to severe erectile dysfunction (ED)
• Premature ejaculation is not exclusively due to the direct effects of a substance (e.g., withdrawal from opioids)
• Must be in good general health with no clinically significant abnormalities as determined by medical history, physical examination, and clinical lab results
• Must have a blood pressure =180 mmHg systolic and =100 mmHg diastolic at screening and at the baseline visit
• Patient's partner must not be pregnant at screening as pregnancy might affect sexual activity
• Participants and partners must agree to attempt sexual intercourse at least 2 times (with a minimum of 24 hours between each event) during the 2-week baseline period and at least 4 times per month during the remainder of the study.

Exclusion Criteria:

• History of or current major psychiatric disorder such as mood disorder, anxiety disorder, schizophrenia, mania, suicidal ideation, other psychotic disorder
• History of alcohol abuse and dependence, non-alcohol psychoactive substance use disorder (except for caffeine or nicotine/tobacco)
• Suspected history of illicit or recreational drug use
• Known history of moderate to severe renal impairment

Study Plan

How is the study designed?

Design Details

• Primary Purpose: TREATMENT
• Allocation: NA
• Interventional Model: SINGLE_GROUP
• Masking: NONE

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
EXPERIMENTAL: Dapoxetine; Starting dose is one 30-mg tablet taken approximately 1-3 hours prior to sexual activity may be increased after 4 weeks to 60mg taken for 12 weeks. The maximum recommended dosing frequency is once every 24 hours.	Drug: Dapoxetine; Starting dose is one 30-mg tablet taken approximately 1-3 hours prior to sexual activity, may be increased after 4 weeks to 60mg, taken for 12 weeks. The maximum recommended dosing frequency is once every 24 hours.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
The Number of Patients Who Described Their Premature Ejaculation (PE) as At Least "Slightly Better" in Response to Dapoxetine Treatment	The "Clinical Global Impression of Change" (CGIC), a patient-reported scale was used to assess the patient's improvement with premature ejaculation (PE) since initiating treatment with dapoxetine. Patients were asked: "Compared to the start of the study, would you describe your premature ejaculation (PE) problem as: Much worse, Worse, Slightly worse, No change, Slightly better, Better, or Much better?" The number of patients who described improvement with their PE of at least "slightly better" after 12 weeks of treatment with dapoxetine are provided in the table below.	Week 12

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
The Patient's Level of Control Over Ejaculation	The Premature Ejaculation Profile (PEP), a patient-reported outcome measure was used to rate the patient's level of control over intercourse on a 5-point scale. Patients were asked: "Over the past month, was your level of control over ejaculation Very poor, Poor, Fair, Good, or Very Good?" The number of patients who rated their level of control over ejaculation before treatment and after 12 weeks of treatment with dapoxetine are provided in the table below.	Baseline and Week 12
The Patient's Level of Satisfaction With Intercourse	The Premature Ejaculation Profile (PEP), a patient-reported outcome measure was used to rate the patient's level of satisfaction with intercourse on a 5-point scale. Patients were asked: "Over the past month, was your satisfaction with sexual intercourse Very poor, Poor, Fair, Good, or Very Good?" The number of patients who rated their level of satisfaction with control over ejaculation at before treatment and after 12 weeks of treatment with dapoxetine are provided in the table below.	Baseline and Week 12
The Patient's Level of Personal Distress Related to the Speed of Ejaculation	The Premature Ejaculation Profile (PEP), a patient-reported outcome measure was used to rate the patient's level of distress related to the speed of ejaculation. Patient's were asked: "Over the past month, how distressed were you by how fast you ejaculated during sexual intercourse? Not at all, A little bit, Moderately, Quite a bit, Extremely." The number of patients who rated their level of personal distress related to the speed of ejaculation before treatment and after 12 weeks of treatment with dapoxetine are provided in the table below.	Baseline and Week 12
The Patient's Degree of Interpersonal Difficulty Related to the Speed of Ejaculation	The Premature Ejaculation Profile (PEP), a patient-reported outcome measure was used to rate the patient's level of interpersonal difficulty related to the speed of ejaculation. Patient's were asked: "Over the past month, to what extent did how fast you/your partner ejaculated during sexual intercourse cause difficulty in your relationship with your partner? Not at all, A little bit, Moderately, Quite a bit, or Extremely?" The number of patients who rated their level of interpersonal difficulty before treatment and after 12 weeks of treatment with dapoxetine are provided in the table below.	Baseline and Week 12
Patient Responses to Improvement With Their Premature Ejaculation After 12 Weeks of Treatment With Dapoxetine	The "Clinical Global Impression of Change" (CGIC), a patient-reported scale was used to assess the patient's improvement with premature ejaculation (PE) since initiating treatment with dapoxetine. Patients were asked: "Compared to the start of the study, would you describe your premature ejaculation (PE) problem as: Much worse, Worse, Slightly worse, No change, Slightly better, Better, or Much better?" The number of patients reporting improvement in their PE by category of the CGIC scale after 12 weeks of treatment with dapoxetine are provided in the table below.	Week 12
The Number of Patients Who Described Their Premature Ejaculation (PE) as At Least "Slightly Better" in Response to Dapoxetine Treatment (Subgroups by Dosage)	The "Clinical Global Impression of Change" (CGIC) was used to assess the patient's improvement with premature ejaculation (PE) since initiating treatment with dapoxetine. The data provided below represent the number of patients who reported at least a slightly better response to treatment by the dose of dapoxetine they received in the study. This was a single-arm, open-label, non-randomized study in which "subgroup by dosage" was categorized based on dose-titration patterns observed during the course of the treatment period.	Week 12
The Number of Patients Who Described Their Premature Ejaculation (PE) as At Least "Slightly Better" in Response to Dapoxetine Treatment (Subgroups by Disease Type)	The "Clinical Global Impression of Change" (CGIC) was used to assess the patient's improvement with premature ejaculation (PE) since initiating treatment with dapoxetine. The data provided below represent the number of patients who reported at least a "slightly better" response to treatment when grouped by type of PE disease (patients with life-long PE and patients with acquired PE). This was a single-arm, open-label, non-randomized study where patients were categorized based their PE disease after enrollment in the study.	Week 12
The Number of Patients Who Described Their Premature Ejaculation (PE) as At Least "Slightly Better" in Response to Dapoxetine Treatment (Subgroups by Intravaginal Ejaculation Latency Time [IELT])	The "Clinical Global Impression of Change" (CGIC) was used to assess the patient's improvement with premature ejaculation (PE) since initiating treatment with dapoxetine. The data provided below represent the number of patients who reported at least a "slightly better" response to treatment when grouped by intravaginal ejaculation latency time (patients with an IELT of < 1 minute and patients with an IELT of > 1 minute). This was a single-arm, open-label, non-randomized study where patients were categorized based on IELT after enrollment in the study.	Week 12

Collaborators and Investigators

• Sponsor: Johnson & Johnson Pte Ltd

Study record dates

Study Major Dates

• Study Start: May 1, 2010
• Primary Completion (ACTUAL): June 1, 2011
• Study Completion (ACTUAL): June 1, 2011

Study Registration Dates

• First Submitted: February 4, 2010
• First Submitted That Met QC Criteria: February 4, 2010
• First Posted (ESTIMATE): February 5, 2010

Study Record Updates

• Last Update Posted (ESTIMATE): February 4, 2013
• Last Update Submitted That Met QC Criteria: January 31, 2013
• Last Verified: January 1, 2013

More Information

Terms related to this study

• Keywords: Premature Ejaculation; Dapoxetine; Phase 3b; Sexual Dysfunction, physiological; R096769
• Additional Relevant MeSH Terms: Mental Disorders; Pregnancy Complications; Obstetric Labor Complications; Sexual Dysfunctions, Psychological; Obstetric Labor, Premature; Premature Birth; Premature Ejaculation; Sexual Dysfunction, Physiological
• Other Study ID Numbers: CR016561; R096769PRE3009 (OTHER: Johnson & Johnson Pte Ltd); PASSION (OTHER: Johnson & Johnson Pte Ltd)