Assess the Effect of Daily Treatment of Vardenafil 20mg or Sildenafil 100mg and Placebo on Sperm Function

Condition:   Erectile DysfunctionInterventions:   Drug: Levitra (Vardenafil, BAY38-9456);   Drug: Sildenafil;   Drug: PlaceboSponsor:   BayerCompleted - verified December 2014

Source: ClinicalTrials.gov - April 4, 2008 Category: Research Source Type: clinical trials