Concomitant administration of strong CYP3A4 inducers, such as rifampin, is expected to cause greater decreases in plasma levels of sildenafil. Use only the brand of this medicine that your doctor prescribed. Sildenafil at steady state, at a dose not approved for the treatment of erectile dysfunction 80 mg t. Do not drink grapefruit juice if you’re taking sildenafil Revatio for pulmonary hypertension. 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: 25 mg.Tell your healthcare provider about all the medicines you take,* including prescription and over-the-counter medicines, vitamins, and herbal supplements. VIAGRA may affect the way other medicines work, and other medicines may affect the way VIAGRA works causing side effects. Especially tell your healthcare provider if you take any of the following. Sildenafil (Viagra) is a medicine used to treat erectile dysfunction (ED, also called impotence). Sildenafil works by helping to relax the blood vessels in the penis, allowing more blood to flow in and cause an erection. You should take sildenafil about an hour before planned sexual activity, so it has time to work. Top 5 ED Pills That Are Like Viagra. Performer 8 – Overall Best Over The Counter ED Pills; Top Selling. VigRX Plus – Best Male Enhancement Pills For Better Sex Drive. TestoPrime – Best Sex Pills.