For common outcomes there was similar efficacy between PDE-5 inhibitors
Background There are no r and omised and properly blinded trials directly comparing one PDE-5 inhibitor with another in a normal home setting .
Valid indirect comparisons with a common comparator must examine equivalent doses , similar duration , similar population s , with the same outcomes reported in the same way .
Efficacy of tadalafil for the treatment of erectile dysfunction at 24 and 36 hours after dosing: a randomized controlled trial.
OBJECTIVES To examine the therapeutic effects of tadalafil on erectile dysfunction ( ED ) at 24 and 36 hours after dosing . METHODS A multicenter , r and omized , double-blind , placebo-controlled , parallel-group study of 348 men ( mean age 57 years ) with ED was conducted in Europe and the United States . Patients were stratified by baseline severity of ED using the Erectile Function domain score of the International Index of Erectile Function and then r and omly allocated within the severity group to receive tadalafil 20 mg ( n = 175 ) or placebo ( n = 173 ) . Subsequently , participants were r and omly assigned to two 4-week treatment intervals , during which they were requested to attempt sexual intercourse approximately 24 or 36 hours after tadalafil or placebo dosing . The primary outcome measure was the proportion of successful sexual intercourse attempts ( completed to ejaculation ) according to patient self-report using the Sexual Encounter Profile diary . RESULTS Of the 348 patients , 327 ( 94 % ) completed the trial ( 163 of 175 in the  tadalafil group and 164 of 173 in the placebo group ) . Thirty-six hours after tadalafil dosing , 59.2 % of intercourse attempts were successful versus 28.3 % in the placebo group ( P < 0.001 ) . The proportion of successful intercourse attempts at approximately 24 hours after treatment was also significantly greater with tadalafil ( 52.9 % ) than with placebo ( 29.1 % ; P < 0.001 ) . Tadalafil was well tolerated . The incidences of four treatment-emergent adverse events were significantly greater in the tadalafil group than in the placebo group ( all P < 0.05 ) : headache , flushing , dyspepsia , and myalgia . CONCLUSIONS Tadalafil 20 mg is an effective and well-tolerated treatment for ED that has a period of responsiveness of up to 36 hours
For common outcomes there was similar efficacy between PDE-5 inhibitors
Background There are no r and omised and properly blinded trials directly comparing one PDE-5 inhibitor with another in a normal home setting .
Valid indirect comparisons with a common comparator must examine equivalent doses , similar duration , similar population s , with the same outcomes reported in the same way .