What is the Generic Levitra? The name of the active ingredient in Levitra is vardenafil. It is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, vardenafil works by increasing blood flow to the p*nis to help a man get and keep an erection. This increased blood flow can cause an erection. vardenafil generic does not cure erectile dysfunction or increase sexual desire. Vardenafil does not prevent pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus (HIV). vardenafil dosage, what is vardenafil, buy vardenafil online