A starting oral dose of 25 mg should be considered in those patients [see Dosage and Administration 2. The patent was published in and expired in However, if you take sildenafil with a high-fat meal, it will take longer for the medication to start to work. These results demonstrated that the effect of VIAGRA on the primary endpoint was statistically non-inferior to placebo. The patient addressed both questions at the final visit for the last 4 weeks of the study. · VIAGRA is supplied as blue, film-coated, rounded-diamond-shaped tablets containing sildenafil citrate equivalent to 25 mg, 50 mg, or mg of sildenafil. Tablets are debossed with PFIZER on one side and VGR25, VGR50 or VGR on the other to indicate the dosage strengths. 4. Contraindications. Sildenafil, sold under the brand name Viagra, among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud’s phenomenon. It is unclear if it is effective for treating See more. Sildenafil citrate is a white to off-white crystalline powder with a solubility of mg/mL in water and a molecular weight of VIAGRA is formulated as blue, film-coated rounded-diamond-shaped tablets equivalent to 25 mg, 50 mg and mg of sildenafil for oral administration.