Vardenafil was significantly superior to sildenafil in terms of erectile function, intercourse satisfaction and overall 在勃起功能，性交满意度和总体满意度方面，伐地那非显著优于西地那非。
Study of pharmacokinetics of vardenafil tablets in Chinese male healthy volunteers伐地那非片剂在中国健康男性志愿者中的药动学研究