Levitra is a phosphodiesterase 5 (PDE5) inhibitor taken by mouth for the treatment of erectile dysfunction (ED) in men. Vardenafil is a medication that treats erectile dysfunction. ED is the inability to achieve and sustain an erection suitable for sexual intercourse. Vardenafil: learn about side effects, dosage, special precautions, and more on MedlinePlus Description Vardenafil is used to treat men with erectile dysfunction (sexual impotence). It belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where this enzyme works. Erectile dysfunction is a condition where the penis does not harden and expand. Vardenafil: side effects, dosage, interactions, FAQs, reviews. Used for: erectile dysfunction Levitra (vardenafil hydrochloride) is an oral medication taken to treat erectile dysfunction (ED). It’s in the same class of drugs as other popular ED medications, including Viagra and Cialis. Find patient medical information for Vardenafil (Levitra, Staxyn) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Learn about vardenafil usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives. You may already know most of the names: Cialis, Levitra, Staxyn, Stendra, Viagra. Learn more about these medications that can help men with erectile dysfunction get and keep an erection. Levitra relaxes muscles and increases blood flow to particular areas of the body and is used to treat erectile dysfunction. Learn about side effects, interactions and indications.