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Viagra (Sildenafil)
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
Sildenafil - Wikipedia, the free encyclopedia
Sildenafil citrate, sold under the names Viagra, Revatio and under various other names, is a drug used to treat male erectile dysfunction (impotence) and pulmonary arterial hypertension (PAH), developed by the pharmaceutical company Pfizer. Its primary competitors on the market are tadalafil (Cialis), and vardenafil (Levitra).History · Mechanism of action · Dosage and price · Contraindications http://en.wikipedia.org/wiki/<...
Viagra - RxList
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/cgi/gene...
