Sildenafil citrate efficacy 8 h postdose in men with mild to moderate erectile dysfunction

In two randomized, double-blind, placebo-controlled trials of 100 mg sildenafil citrate, men (N=601) with mild to moderate erectile dysfunction (ED) attempted intercourse 8 h (range, 7-9 h) postdose. The baseline to end-of-treatment improvement in the sildenafil groups vs placebo was greater (P<0.001) for the per-patient proportion (PPP) of 'yes' responses to the Sexual Encounter Profile question 3 (SEP3: successful intercourse (primary outcome)) (odds ratio (OR)=3.2 (trial 1), 7.6 (trial 2) and 5.6 (pooled data)); PPP of erection hardness score 4 (EHS 4, completely hard and fully rigid) (OR=6.2 (trial 1) and 10.9 (trial 2)); scores on the International Index of Erectile Function; and other EHS and SEP outcomes. Two to three times as many men were satisfied with sildenafil vs placebo treatment (Erectile Dysfunction Inventory of Treatment Satisfaction Index >50). Thus, responsiveness to 100 mg sildenafil may persist for 8 h postdose in men with mild to moderate ED.