50 A Phase II, double-blind, placebo-controlled, multi-center, parallel-group clinical trial showed that udenafil produced a highly significant improvement in erectile function, with an up to 91% vaginal penetration success rate. 53 The clinical efficacy of udenafil in patients with ED of a variety of underlying etiologies, severities, and ages of the patients has been suggested in several randomized, placebo-controlled trials. 27 – 29 , 31 – 33 Patient characteristics, outcome measures, and results of these trials are summarized in Tables 1 and 2 .
1
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