Efficacy and safety of oral sildenafil in the treatment of erectile dysfunction / 中华泌尿外科杂志

ABSTRACT

Objective To evaluate the efficacy and safety of sildenafil (viagra ) on men with ED of various etiologies in China. Methods This study was a double blind, randomized (1∶3, placebo∶ sildenafil), placebo controlled, parallel group, multi center, flexible dose escalation study of sildenafil oral tablets (25, 50 and 100mg) taken over an 8 weeks period. A total of 628 subjects were screened and randomized. Results The primary efficacy variables (questions 3 and 4 from IIEF) revealed a statistically significant ( P