Transcript: Vardenafil is a prescription medication which is available under the brand name Levitra. Levitra is a member of the phosphodiesterase inhibitor family. Here’s how Levitra works: When a man becomes erect, the arteries in his penis carry blood through the spongy tissue inside. When a health problem keeps genital blood from flowing properly, vardenafil increases blood flow to the penis, resulting in an erection. This increased blood flow to the penis makes Levitra effective for treating the symptoms of erectile dysfunction, including helping a man to get and maintain an erection. Levitra is available in two point five, five, ten, and twenty milligram tablets. Levitra should be taken as needed about sixty minutes before sexual activity. Never take this medication more than once a day. The most common side effects of Levitra include headaches, flushed skin, and a stuffy or runny nose, but please ask your doctor for a complete list.  Also, be sure to tell your physician IMMEDIATELY if you experience an erection that lasts longer than four hours, alterations in your vision, or any other significant changes. Levitra should not be taken in conjunction with medications that contain nitrates and should be avoided by men whose doctors have asked them not to engage in sex. Ask your doctor for a full list of medications and conditions that should not be combined with Levitra. Many men suffer from some sort of erectile dysfunction, and Levitra can be effective at easing symptoms. However, this drug should always be used under the direct care of a physician. Please ask for and review all of the information provided by your doctor before taking Levitra.