[Efficacy and safety of vardenafil for men with erectile dysfunction].

Vardenafil is an oral, potent, highly selective phosphodiesterase 5 (PDE5) inhibitor. It improves erectile function significantly regardless of the etiology and severity of erectile dysfunction (ED) or the age of the patients. Its onset time leading to successful intercourse is as short as 10 minutes after administered orally, and in most patients it works persistently. Adverse reactions are generally transient and mild to moderate in nature. So vardenafil is both effective and safe for men with ED.