Levitra is used to treat erectile dysfunction, which is a man's inability to maintain an erection. It works by relaxing muscles in the penis, allowing more blood to flow to it.
The active ingredient in Levitra is vardenafil. The medication was first made available in 2003, and in the United States, you can only obtain it with a prescription.
Levitra is taken on an as-needed basis, about one hour before you want to have sex. Alcohol and grapefruit should be avoided when taking this medication as they can produce severe side effects.