Assess the Effect of Daily Treatment of Vardenafil 20mg or Sildenafil 100mg and Placebo on Sperm Function
Public ClinicalTrials.gov record NCT00655590. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Randomized, Double-blind, Placebo Controlled, Parallel Arm, Multicenter Trial Assessing the Effect of Daily Treatment of Vardenafil 20 mg or Sildenafil 100 mg Compared to Placebo on Spermatogenesis
Study identification
- NCT ID
- NCT00655590
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 4
- Lead sponsor
- Bayer
- Industry
- Enrollment
- 200 participants
Conditions and interventions
Conditions
Interventions
- Levitra (Vardenafil, BAY38-9456) Drug
- Sildenafil Drug
- Placebo Drug
Drug
Eligibility (public fields only)
- Age range
- 25 Years to 64 Years
- Sex
- Male
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Dec 31, 2004
- Primary completion
- May 31, 2006
- Completion
- May 31, 2006
- Last update posted
- Dec 29, 2014
2005 – 2006
United States locations
- U.S. sites
- 18
- U.S. states
- 10
- U.S. cities
- 18
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Not listed | Phoenix | Arizona | 85023 | — |
| Not listed | Tempe | Arizona | 85282 | — |
| Not listed | Beverly Hills | California | 90212 | — |
| Not listed | La Mesa | California | 91942-3058 | — |
| Not listed | Laguna Hills | California | 92653 | — |
| Not listed | San Diego | California | 92128 | — |
| Not listed | Torrance | California | 90502-2004 | — |
| Not listed | Van Nuys | California | 91405 | — |
| Not listed | Waterbury | Connecticut | 06708 | — |
| Not listed | Aventura | Florida | 33180 | — |
| Not listed | New Orleans | Louisiana | 70112 | — |
| Not listed | Ann Arbor | Michigan | 48109-0330 | — |
| Not listed | Minneapolis | Minnesota | 55455 | — |
| Not listed | Rochester | Minnesota | 55905 | — |
| Not listed | Great Neck | New York | 11021 | — |
| Not listed | New York | New York | 10016-4576 | — |
| Not listed | Cincinnati | Ohio | 45212-2787 | — |
| Not listed | San Antonio | Texas | 78229 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00655590, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Dec 29, 2014 · Synced Jul 21, 2026
Related: full search, browse by condition, browse by drug or therapy, browse by sponsor, browse by U.S. city.
Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00655590 live on ClinicalTrials.gov.