Vardenafil has previously been demonstrated to be effective and well tolerated, and to have a rapid onset of action in men with erectile dysfunction. In this prospective study, Porst et al.

Background This multicenter, randomized, double-blind, double-dummy, placebo-controlled trial primarily evaluated the efficacy of tadalafil once-daily (OaD) or on-demand ("pro-re-nata"; PRN ...

Vardenafil typically starts working faster, around 15 to 30 minutes after ingestion, while sildenafil may take 30 to 60 ...

Tadalafil 20-milligram side effects are often ... Other PDE5 inhibitors, such as sildenafil (Viagra), vardenafil (Levitra), and avanafil (Stendra), will interact with Cialis.