Vardenafil hydrochloride (Levitra®) is a medication to treat erectile dysfunction. It helps a male patient achieve and sustain an erection by promoting a better flow of blood into the penis, enabling him to successfully engage in sexual intercourse. Some patients will experience a harder erection after using Vardenafil hydrochloride (Levitra®) which permits better vaginal penetration. The medication is available in either generic drug form or as a brand-name pharmaceutical.