Vardenafil provides reliable efficacy over time in men with erectile dysfunction.
Montorsi F, Hellstrom WJ, Valiquette L, Bastuba M, Collins O, Taylor T, Thibonnier M, Homering M, Eardley I; North American and European Vardenafil Groups.
Montorsi F, et al. Among authors: hellstrom wj.
Urology. 2004 Dec;64(6):1187-95. doi: 10.1016/j.urology.2004.07.032.
Urology. 2004.
PMID: 15596195