CClinicalTrials.gg
CompletedNCT00644631Updated Feb 1, 2021

A Multicenter, Randomized, Parallel Group, Double-Blind, Placebo Controlled, Flexible Dose Escalation Study To Evaluate Sexual And Relationship Satisfaction In The Female Partner Of Men With Erectile Dysfunction Treated With Sildenafil Citrate

A Phase 4 interventional study of sildenafil and placebo in Erectile Dysfunction, sponsored by Pfizer's Upjohn has merged with Mylan to form Viatris Inc.. Completed at 31 sites in United States. Open to participants aged 21 Years and older. Per ClinicalTrials.gov, last updated 2021-02-01.

Sponsored by Pfizer's Upjohn has merged with Mylan to form Viatris Inc. · Phase 4, Interventional, and Treatment

Phase
Phase 4
Study type
Interventional
Enrollment
300
Allocation
Randomized
Ages
21 Years and older
Sex
All
01

Study summary

To compare the effects of sildenafil versus placebo on the female partner's sexual satisfaction as assessed by Question 3 of Female Partner of Erectile Dysfunction (ED) Subject Questionnaire (FePEDS-Q): "Over the past 4 weeks, when you had sexual intercourse, how often was it satisfactory for you?" For ED subjects, determine difference in the Erectile Function domain of International Index of Erectile Function (IIEF) between sildenafil citrate and placebo at end of the treatment phase and determine the overall relationship between improved erectile function and increased ED subject and female partner satisfaction.

02

Conditions studied

  • Erectile Dysfunction

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03

In context

Erectile Dysfunction

683 studies on the registry are indexed under Erectile Dysfunction; 117 are open to participants now.

This study's planned enrollment of 300 is above the median of 72 across 542 interventional studies indexed under Erectile Dysfunction.

Browse Erectile Dysfunction studies →

Lead sponsor

Pfizer's Upjohn has merged with Mylan to form Viatris Inc. is the lead sponsor of 431 studies on the registry; none are open to participants now.

Of its 9 completed or terminated interventional studies of FDA-regulated products, 8 (89%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
21 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • The male patient must have had a documented clinical diagnosis of erectile dysfunction (ED) confirmed by a Sexual Health Inventory-Male (SHI-M) score of less than or equal to 21
  • a stable female partner at least 21 years of age for at least 6 months prior to screening
  • the couple must have been married or living together at the time of screening.
  • The female partner must have answered "no intercourse," "sometimes," "a few times" or "almost never" on Question 3 of the Female Partner of ED Subject Questionnaire (FePEDS-Q)

Exclusion criteria

Exclusion Criteria:

  • The male patient must not have had resting sitting and/or standing hypotension (BP \< 90/50mmHg) or hypertension (BP > 170/110mmHg), or significant cardiovascular disease in the last 3 months, including cardiac failure, myocardial infarction, unstable angina, stroke, transient ischemic attack (TIA), symptomatic or clinically significant cardiac arrhythmias.
  • Female partners must not have had significant dyspareunia or lifelong significant sexual dysfunction based on female partner's medical and sexual history at screening.
05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
300 participants (estimated)

Study arms

  • Active comparator
    Arm 1

    Drug: sildenafil

  • Placebo comparator
    Arm 2

    Drug: placebo

Interventions

  • Drugsildenafil

    sildenafil 50 mg (initial dose) tablet by mouth 30 to 60 minutes prior to sexual activity for 12 weeks; depending upon safety, efficacy and tolerability, the dose could be increased to 100 mg or reduced to 25 mg, if necessary.

  • Drugplacebo

    placebo tablet by mouth 30 to 60 minutes prior to sexual activity for 12 weeks

06

What researchers measure

Primary outcomes

  1. Question 3 of the Female Partner ED Subject Questionnaire (FePEDS-Q) in female partners.

    Time frame: Week 12

Secondary outcomes

  1. International Index of Erectile Function (IIEF) Erectile Function, Desire, Orgasm, Intercourse Satisfaction, and Overall Satisfaction Domains in ED patients

    Time frame: Week 8 and Week 12

  2. Self-Esteem and Relationship Questionnaire (SEAR) in ED patients

    Time frame: Week 12

  3. ED Subject Event Log in ED patients

    Time frame: Week 12

  4. Erectile Dysfunction Inventory of Treatment Satisfaction (EDITS) index of treatment satisfaction in ED patients

    Time frame: Week 12

  5. Dyadic Adjustment Scale (DAS) in ED patients

    Time frame: Week 8 and Week 12

  6. American Urological Association (AUA) Symptom Index in ED patients

    Time frame: Week 12

  7. Global Efficacy Assessment Questions (GEQ) in ED patients

    Time frame: Week 12

  8. Questions 1 and 2 of Female Partner of ED Subject Questionnaire (FePEDS-Q) in female partners

    Time frame: Week 8 and Week 12

  9. Sexual Function Questionnaire (SFQ) Desire, Arousal, Enjoyment and Orgasm Domains in female partners

    Time frame: Week 12

  10. Female Sexual Function Inventory (FSFI) Desire, Satisfaction and Arousal Domains in female partners

    Time frame: Week 12

  11. Partner EDITS in female partners

    Time frame: Week 12

  12. Female Partner Treatment Continuation Question in female partners

    Time frame: Week 12

  13. Dyadic Adjustment Scale (DAS) in female partners

    Time frame: Week 8 and Week 12

  14. Beck Depression Inventory (BDI-II) in female partners

    Time frame: Week 12

  15. Female Partner Event Log in female partners

    Time frame: Week 12

  16. AUA Symptom Index in female partners

    Time frame: Week 12

07

Study locations

31 sites
  • Pfizer Investigational Site
    Huntsville, Alabama 35801, United States
  • Pfizer Investigational Site
    Little Rock, Arkansas, United States
  • Pfizer Investigational Site
    Beverly Hills, California 90212, United States
  • Pfizer Investigational Site
    Laguna Woods, California 92653, United States
  • Pfizer Investigational Site
    Los Angeles, California 90033, United States
  • Pfizer Investigational Site
    Los Angeles, California 90073, United States
  • Pfizer Investigational Site
    Palo Alto, California 94305, United States
  • Pfizer Investigational Site
    Torrance, California 90505, United States
  • Pfizer Investigational Site
    Aurora, Colorado 80012, United States
  • Pfizer Investigational Site
    Waterbury, Connecticut 06708, United States
  • Pfizer Investigational Site
    Ocala, Florida 34474, United States
  • Pfizer Investigational Site
    Peoria, Illinois 61614, United States
  • Pfizer Investigational Site
    Jeffersonville, Indiana 47130, United States
  • Pfizer Investigational Site
    Des Moines, Iowa 50314, United States
  • Pfizer Investigational Site
    Overland Park, Kansas 66215, United States
  • Pfizer Investigational Site
    Baltimore, Maryland 21204, United States
  • Pfizer Investigational Site
    Peabody, Massachusetts 01960, United States
  • Pfizer Investigational Site
    Saint Louis, Missouri 63117, United States
  • Pfizer Investigational Site
    Garden City, New York 11530, United States
  • Pfizer Investigational Site
    New York, New York 10016, United States
  • Pfizer Investigational Site
    New York, New York 10032, United States
  • Pfizer Investigational Site
    Poughkeepsie, New York 12601, United States
  • Pfizer Investigational Site
    Durham, North Carolina 27705, United States
  • Pfizer Investigational Site
    Beachwood, Ohio 44122-5402, United States
  • Pfizer Investigational Site
    Newtown, Pennsylvania 18940, United States
  • Pfizer Investigational Site
    Knoxville, Tennessee 37920, United States
  • Pfizer Investigational Site
    Dallas, Texas 75231, United States
  • Pfizer Investigational Site
    San Antonio, Texas 78229, United States
  • Pfizer Investigational Site
    Lacey, Washington 98516, United States
  • Pfizer Investigational Site
    Seattle, Washington 98105, United States
  • Pfizer Investigational Site
    Spokane, Washington 99207, United States
08

References and documents

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 1, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00644631
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Responsible party
Sponsor
First posted
Mar 27, 2008
Start date
Jun 2003
Completion
Apr 2004
Last update
Feb 1, 2021

Study contacts

Pfizer CT.gov Call Center
study director · Pfizer

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jan 2021. You cannot join it, but the record below documents what was studied.

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