Viagra - Men's Health - Health and Fitness Information for Men -Viagra Treatment for Erectile Dysfunction. From Jerry Kennard, former About.com Guide. Updated March 16, 2012. About.com Health's Disease and Condition ...
http://menshealth.about.com/cs/impotence1/a/viagra.htm
VIAGRA® (sildenafil citrate) -Pfizer's official site for this drug, with information for both patients and medical professionals.
http://www.viagra.com/
Viagra (sildenafil oral) medical facts from Drugs.com -Physician reviewed Viagra (oral) patient information - includes Viagra description, dosage and directions.
http://www.drugs.com/mtm/viagra.html
Sildenafil - PubMed Health - National Center for Biotechnology ... -Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Revatio) is used to improve ...
http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001046/
Viagra Tablets Facts and Comparisons at Drugs.com -Some MEDICINES MAY INTERACT with Viagra. Tell your health care provider if you are taking any other medicines, especially any of the following:
http://www.drugs.com/cdi/viagra.html
Viagra Oral : Uses, Side Effects, Interactions, Pictures, Warnings ... -Find patient medical information for Viagra Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings.
http://www.webmd.com/drugs/mono-297-SILDENAFIL+-+ORAL.aspx?drugid=7417&drugname=Viagra+Oral
BBC News | Viagra | Health warnings to Viagra users -Wednesday, November 25, 1998 Published at 00:47 GMT Health warnings to Viagra users Reports of deaths and side-effects have prompted warning labels
http://news.bbc.co.uk/2/hi/special_report/1998/viagra/221497.stm