Levitra is a medication also known as vardenafil relaxes muscles found in the walls of blood vessels and increases blood flow to particular areas of the body. Levitra is used to treat erectile dysfunction that is impotence with males, when a man is unable to get or sustain an erection. Levitra may also be used for purposes not listed in this medication guide. During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. You could be having a serious side effect.