Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

Study to Evaluate Viagra's Ability to Provide a Better Sexual Experience Through Quality Erections and Satisfaction

This study has been completed.
Information provided by:
Pfizer Identifier:
First received: October 25, 2005
Last updated: October 5, 2006
Last verified: October 2006

The study objective is to:

  1. To evaluate the effect of sildenafil citrate versus placebo on the IIEF_EF Domain at the end of the double-blind phase
  2. To assess the relationship between treatment with sildenafil citrate or placebo and responses to the Quality of Erection Questionnaire (QEQ) and Sexual Experience Questionnaire (SEX_Q).

Condition Intervention Phase
Drug: Sildenafil Citrate
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double-Blind
Primary Purpose: Treatment
Official Title: A Multicenter, Double-Blind Placebo Controlled, Fixed Dose Study With An Open-Label, Flexible Dose Phase To Assess The Efficacy Of Sildenafil Citrate In Providing A Better Sexual Experience Including Quality Of Erections And Satisfaction In Men With Erectile Dysfunction

Resource links provided by NLM:

Further study details as provided by Pfizer:

Primary Outcome Measures:
  • The primary endpoint is the change from baseline to Visit 4 (Week 8) in the IIEF Erectile Function (EF) domain score.

Secondary Outcome Measures:
  • The change from baseline to visit 6 (wk 12) in the IIEF-EF domain; the change from baseline to visit 4 (wk 8) and visit 6 (wk 12) in the domains and total score as well as the individual questions of the sexual experience questionnaire

Estimated Enrollment: 312
Study Start Date: November 2005
Estimated Study Completion Date: September 2006

Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Male subjects aged 18-65.
  • Documented clinical diagnosis of erectile dysfunction confirmed by an IIEF-EF Domain score of less than or equal to 25. (If the subject scores greater than 25 on the IIEF-EF Domain, screening procedures should be terminated.)

Exclusion Criteria:

  • Subjects who have been treated with more than 6 doses of sildenafil citrate or any other phosphodiesterase type 5 (PDE-5) inhibitor such as vardenafil or tadalafil for erectile dysfunction [Note: subjects should not have taken any PDE-5 inhibitors within 4 weeks prior to the date of screening].
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00245258

Korea, Republic of
Pfizer Investigational Site
Pusan, Korea, Republic of, 602-739
Pfizer Investigational Site
Seoul, Korea, Republic of, 110-744
Pfizer Investigational Site
Seoul, Korea, Republic of, 135-710
Pfizer Investigational Site
Seoul, Korea, Republic of, 136-705
Pfizer Investigational Site
Seoul, Korea, Republic of, 138-736
Pfizer Investigational Site
Seoul, Korea, Republic of, 158-710
Russian Federation
Pfizer Investigational Site
St. Petersburg, Russia, Russian Federation
Pfizer Investigational Site
Moscow, Russian Federation, 105425
Pfizer Investigational Site
Moscow, Russian Federation, 117036
Pfizer Investigational Site
Moscow, Russian Federation, 125101
Pfizer Investigational Site
Rostov-on-Don, Russian Federation, 344022
Pfizer Investigational Site
Santander, Cantabria, Spain, 39008
Pfizer Investigational Site
Barcelona, Spain, 08035
Pfizer Investigational Site
Madrid, Spain, 28046
Pfizer Investigational Site
Sevilla, Spain, 41014
Pfizer Investigational Site
Karlshamn, Sweden, 374 35
Pfizer Investigational Site
Malmo, Sweden, 205 02
Pfizer Investigational Site
Skovde, Sweden, 541 31
Pfizer Investigational Site
Stockholm, Sweden, 171 76
Sponsors and Collaborators
Study Director: Pfizer Call Center Pfizer
  More Information

Additional Information:
Publications automatically indexed to this study by Identifier (NCT Number): Identifier: NCT00245258     History of Changes
Other Study ID Numbers: A1481239
Study First Received: October 25, 2005
Last Updated: October 5, 2006

Additional relevant MeSH terms:
Erectile Dysfunction
Sexual Dysfunction, Physiological
Genital Diseases, Male
Sexual Dysfunctions, Psychological
Mental Disorders
Citric Acid
Sildenafil Citrate
Calcium Chelating Agents
Chelating Agents
Sequestering Agents
Molecular Mechanisms of Pharmacological Action
Vasodilator Agents
Phosphodiesterase 5 Inhibitors
Phosphodiesterase Inhibitors
Enzyme Inhibitors
Urological Agents processed this record on May 22, 2017