Offers a clinical overview of how prescription drug Viagra affects nitric oxide levels in the blood as well as sections on recommended dosages and warnings.
http://www.rxlist.com/viagra-drug.htm
Offers information on the oral medications of Viagra, Levitra, and Cialis, the drugs used to treat erectile dysfunction.
http://www.mayoclinic.com/health/erectile-dysfunction/MC00029
Provides information about Viagra including its side effects and drug interactions.
http://www.drugs.com/viagra.html
Sildenafil citrate, sold as Viagra, Revatio and under various other trade names, ... In 2000, Viagra sales accounted for 92 percent of the global market for ...
http://en.wikipedia.org/wiki/Sildenafil
Brief profile of prescription drug Viagra and its use in the treatment of erectile dysfunction. Covers common questions about getting a prescription, ...
http://www.nlm.nih.gov/medlineplus/druginfo/meds/a699015.html
Saturday Night Live asks the men of New York if they need Viagra.
http://www.usrf.org/breakingnews/viagrasnl.html
Official information from the U.S. Food and Drug Administration about prescription drug Viagra (sildenfil citrate), approved to treat impotence, or erectile dysfunction.
http://www.fda.gov/Drugs/DrugSafety/PostmarketDrugSafetyInformationforPatientsandProviders/ucm162833.htm
Basic facts on the erectile dysfunction medicine Sildenafil (brand name Viagra), including its potential side effects and interactions with other medications.
http://familydoctor.org/online/famdocen/home/men/reproductive/465.html
Information about erectile dysfunction drug Viagra, from Pfizer. Find out about how Viagra works, its common side effects, and if it's right for you.
http://www.viagra.com/
Learn about prescription VIAGRA ® (sildenafil citrate), an erectile dysfunction (ED) treatment option that may help your ED.
http://viagra.com/