Vardenafil Hydrochloride and its Impurities

Vardenafil hydrochloride is a phosphodiesterase-5 (PDE5) inhibitor used to treat erectile dysfunction by enhancing blood flow to the penis and improving erectile function. Reference standards of Vardenafil Hydrochloride API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.