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Sildenafil (Viagra) - Wikipedia
User-edited article about sildenafil, the drug sold under the name of Viagra, used to treat male erectile dysfunction and pulmonary arterial hypertension.
en.wikipedia.org
Viagra (Sildenafil)
Official site from Pfizer that offers information about erectile dysfunction drug Viagra. Includes the details of how Viagra works, its common side effects, and if ...
www.viagra.com
BBC - Relationships - Sex and sexual health - Viagra
Taking Viagra relaxes the blood vessels in the penis. This allows blood to flow into the penis causing an erection. However, it will only help you get an ...
www.bbc.co.uk
The Viagra story. Introduction.
An interactive resource for 14 to 16 year old biology students about developing of Viagra and how it targets enzyme action to treat ED.
www.schoolscience.co.uk