Viagra, also known by the generic name, sidenafil, is an oral treatment for erectile dysfunction. According to the National Institute of Diabetes and Digestive and Kidney Diseases, erectile dysfunction affects between 15 and 30 million American men. Viagra was the first erectile dysfunction drug treatment to be approved by the U.S. Food and Drug Administration. It works by relaxing the muscles and allowing blood to flow to the penis to create an erection. There are several treatments other than Viagra for erectile dysfunction.
Levitra
Levitra is the trade name for the drug vardenafil, which is indicated for the treatment of erectile dysfunction. It belongs to the same class of drugs as Viagra, known as phosphodiesterase (PDE) 5 inhibitors. According to Medline Plus, a service of the U.S. National Library of Medicine, it can be taken on an as-needed basis; however, it must not be used more than once in 24 hours. Side effects can include flu-like symptoms, an upset stomach and heartburn. According to the National Institute of Diabetes and Digestive and Kidney Diseases, men taking nitrate-based drugs for heart problems should not use Levitra.
Cialis
Cialis is an oral treatment for erectile dysfunction and, like Levitra and Viagra, is a PDE5 inhibitor. According to the National Institute of Diabetes and Digestive and Kidney Diseases, the recommended dose for Cialis is 10 mg per day, though a patient should always follow a doctor's advice on the correct dose. Cialis should be taken one hour before sexual activity and should not be taken more than once in 24 hours. Side effects of Cialis may include mild muscle pain, a runny nose and dizziness.
Alprostodil
Alprostodil, marketed under the trade name Caverject, is a vasodilator drug that may either be injected into the penis or taken as a suppository. According to Mayoclinic.com, alprostodil produces an erection 5 to 20 minutes after self-injection. The needle used to administer alprostodil is very fine so injury is unusual; however, the National Institute of Diabetes and Digestive and Kidney Diseases notes it may cause a persistent erection and scarring. Alprostodil can also be administered via a suppository which is inserted into the penis. The National Institute of Diabetes and Digestive and Kidney Diseases notes that this method produces an erection in 8 to 10 minutes. It may, however, cause urethral bleeding and aching in the penis and testicles.
