Reliability of efficacy in men with erectile dysfunction treated with tadalafil once daily after initial success
Abstract
The reliability of response to treatment is an important component of erectile dysfunction (ED) treatment. This study examined the reliability of tadalafil once daily (that is, successful attempts/total attempts) following initial successful intercourse. Data pooled from two randomized, double-blind, placebo-controlled trials of men with ED who received tadalafil 2.5 mg (N=96), tadalafil 5 mg (N=206) or placebo (N=148) once daily were analyzed to determine the first-attempt success rate and subsequent reliability of response. The first-attempt success rate (Sexual Encounter Profile question 3 (SEP3)) was significantly higher among men taking tadalafil 2.5 mg (45.7%) and 5 mg (55.2%) compared to placebo (28.5%; P<0.05 and P<0.001, respectively). Furthermore, following initial success, men taking tadalafil 5 mg had a significantly greater proportion of successful intercourse (SEP3) on subsequent attempts (85.9%, P<0.001) compared to men taking placebo (70.2%). Overall, men with ED taking tadalafil once daily experienced a high rate of reliability of efficacy.
How strong is the evidence?
Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 2 of 5 (High · randomized trial). Randomized trials of a reasonable size are the strongest single-study design. Reported size: 206 participants or records.
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