Viagra vs. sildenafil (generic Viagra) Sildenafil is the generic version of Viagra. They have the same active ingredient. Generic medications can be a more affordable alternative to name brand medication. Cialis vs. tadalafil (generic Cialis) Tadalafil is the generic version of Cialis. They have the same active ingredient. Sildenafil: Brand-name Viagra typically sells for $50 or more per dose. Generic sildenafil can sell for as low as $12 per dose. Tadalafil: Brand-name Cialis may cost up to $70 for a 20-mg dose. Find patient medical information for Sildenafil (Viagra, Revatio) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Viagra (sildenafil) is used to treat erectile dysfunction or impotence in men. Includes Viagra side effects, interactions and indications. Sildenafil is the generic formulation of Pfizer’s Viagra, the “little blue pill” that has gained immense popularity for treatment of erectile dysfunction (ED). It was originally approved in the U.S. in 1998, and over 30 million prescriptions have been dispensed for Viagra in 120 countries. How Much Does Viagra Cost? The price of Viagra can vary based on your location, your insurance status, and the pharmacy where you buy it. Because Viagra and generic sildenafil come in different. Viagra (sildenafil) is a brand-name prescription drug that’s used to treat erectile dysfunction (ED). Learn about side effects, warnings, dosage, and more. Learn about sildenafil (Viagra) usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives. Viagra is the brand name for a medicine known as sildenafil which has been proven to be effective for the treatment of erectile dysfunction. The generic drug contains the same active ingredient as the branded drug, in this case sildenafil citrate, and is therapeutically equivalent to the branded medicine Viagra. Sildenafil is used to treat erectile dysfunction in adult men or pulmonary arterial hypertension in adults and children, depending on the brand or formulation. Includes sildenafil side effects, interactions, and indications.