已有研究对他达拉非治疗ED的疗效进行了评估,结果发现,与安慰剂相比,20mg剂量的他达拉非改善勃起功能的疗效可维持36h。美国的一项研究对10mg和20mg剂量的他达拉非以及安慰剂在预先设定的给药后24h和36h时间点上的疗效进行了比较。该研究是一项双盲、安慰剂对照、平行分组临床 Studies have been conducted on the efficacy of tadalafil treatment of ED was evaluated and found that, compared with placebo, tadalafil 20mg dose to improve erectile function efficacy can be maintained for 36h. A U.S. study compared the efficacy of tadalafil and placebo at doses of 10 mg and 20 mg at the 24 h and 36 h after premeditated dosing. The study is a double-blind, placebo-controlled, parallel-grouping clinical trial