The pill with imprint Pfizer VGR 100 (Blue, Four-sided, 14 mm) has been identified as Viagra 100 mg and is used for Erectile Dysfunction. Viagra (sildenafil) is a brand-name prescription drug that’s used to treat erectile dysfunction (ED). Learn about side effects, warnings, dosage, and more. VIAGRA (sildenafil citrate) is supplied as blue, film-coated, rounded-diamond-shaped tablets containing sildenafil citrate equivalent to the nominally indicated amount of sildenafil and debossed on the obverse and reverse sides as follows: VIAGRA is supplied as blue, film-coated, rounded-diamond-shaped tablets containing sildenafil citrate equivalent to 25 mg, 50 mg, or 100 mg of sildenafil. Tablets are debossed with PFIZER on one side and VGR25, VGR50 or VGR100 on the other to indicate the dosage strengths. Viagra’s famously surprising origin story is actually a pretty common way to find new drugs The little blue pill may not have ever been if not for one dutiful nurse. Find patient medical information for Sildenafil (Viagra, Revatio) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings A Study Of The Safety and Efficacy Of Viagra In Men With Erectile Dysfunction Who Do Not Self Identify. ClinicalTrials.gov ID NCT00343200 Sponsor Pfizer's Upjohn has merged with Mylan to form Viatris Inc. Information provided by Pfizer (Pfizer's Upjohn has merged with Mylan to form Viatris Inc.) (Responsible Party) Last Update Posted 2021-02-01. VIAGRA (sildenafil citrate), an oral therapy for erectile dysfunction, is the citrate salt of sildenafil, a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5). Sildenafil, sold under the brand name Viagra among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. [4][8] It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud's phenomenon. [9] It is unclear if it is effective for treating sexual dysfunction in females. [8] It can be taken orally (swallowed by mouth. The Pfizer Patient Assistance Program is a joint program of Pfizer Inc. and the Pfizer Patient Assistance Foundation™. The Pfizer Patient Assistance Foundation is a separate legal entity from Pfizer Inc., with distinct legal restrictions.