Two drugs in this class are Levitra (vardenafil) and Viagra (sildenafil). Levitra is no longer available as a brand-name drug in the United States, so it is now prescribed in its generic form ...

In conclusion, both sildenafil (Viagra) and vardenafil (Levitra) are highly effective treatments for erectile dysfunction. While they share the same underlying mechanism, they differ in minor but ...

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

The anti-impotence drugs vardenafil and sildenafil (Viagra), which inhibit the phosphodiesterases PDE5 and 6, can induce caspase-dependent apoptosis of chronic B-lymphocytic leukaemia (CLL) cells in ...