为了评估按需服用他达拉非在西欧轻度到重度男性ED患者人群中的安全性和疗效,研究者进行了一项随机化、双盲、安慰剂对照、多中心临床试验。患者根据ED的基线严重程度接受随机化处理,按照3∶1的比例分别服用20 mg他达拉非或安慰剂,共12周。主要疗效终点为“国际勃起功能指数”( To assess the safety and efficacy of tadalafil on-demand in people with ED in Western Europe with mild to severe males, the researchers conducted a randomized, double-blind, placebo-controlled, multicenter trial. Patients were randomized to baseline ED severity and received either 20 mg of tadalafil or placebo at a 3: 1 ratio for 12 weeks. The primary efficacy endpoint was “International Index of Erectile Function” (