Levitra (Vardenafil HCl) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Learn about vardenafil usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives. Vardenafil, sold under the brand name Levitra among others, is a medication that is used for treating erectile dysfunction. [1][2] It is a PDE5 inhibitor. [1] It is taken by mouth. What is vardenafil? Vardenafil is used in adult men to treat erectile dysfunction (impotence). Vardenafil may also be used for purposes not listed in this medication guide. Vardenafil Tablets Vardenafil is a medication that treats erectile dysfunction. ED is the inability to achieve and sustain an erection suitable for sexual intercourse. This medication works by increasing blood flow to your penis, which helps you maintain an erection. Vardenafil (Levitra) is another PDE-5 inhibitor that helps increase blood flow into your penis so that you can get an erection and keep it longer. It’s also sometimes prescribed to treat. Vardenafil is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Vardenafil is in a class of medications called phosphodiesterase (PDE) inhibitors. It is important that you tell all of your doctors that you take vardenafil. If you need emergency medical care for a heart problem, it is important that your doctor knows when you last took vardenafil. Vardenafil belongs to a group of medicines, known as phosphodiesterase-5 (PDE-5) inhibitors, which are used to treat erectile dysfunction or pulmonary arterial hypertension.