Sildenafil Citrate, Oral: References

VIAGRA- sildenafil citrate tablet, film coated. Pfizer Laboratories Div Pfizer Inc. U.S. National Library of Medicine, National Institutes of Health, DailyMed. Accessed May 3, 2016 from https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=0b0be196-0c62-461c-94f4-9a35339b4501&audience=consumer

Sildenafil. Lexi-Comp ONLINE, 2016 Lexi-Comp, Inc. Accessed May 3, 2016 from http: Avanafil. //online.lexi.com.

Sildenafil. DRUGDEX® System. 2016 Truven Health Analytics Inc. Accessed May 3, 2016 from http://www.thomsonhc.com