勃起功能障碍(erectile dysfunction,ED)发病率居高不下,美国40～70岁男性ED的发病率为52.0%,而整个人群的完全性ED的患病率为9.6%[1],我国城市男性的ED总发病率为26.1%[2]。用于改善局部或周围神经系统的5型磷酸二酯酶(PDE5)抑制剂是迄今治疗ED最有效的 The incidence of erectile dysfunction (ED) remains high in the United States, with a prevalence rate of 52.0% in men 40-70 years of age in the United States, and a complete prevalence of ED in the entire population of 9.6% [1] The overall incidence of ED was 26.1% [2]. Type 5 phosphodiesterase (PDE5) inhibitors used to improve the local or peripheral nervous system are by far the most effective for the treatment of ED