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Generic Viagra is a non-brand (generic) version of the medication Viagra, used to treat erectile dysfunction (ED). The active ingredient in Viagra is sildenafil citrate. When a drug is on patent, it is often sold under a brand name (like Viagra). Once the patent expires, other manufacturers can produce and sell the drug under its generic name, sildenafil.

The U.S. Food and Drug Administration (FDA) ensures that generic versions are as safe and effective as the brand-name original. Generic versions of drugs typically cost less than the brand-name versions, making them a more affordable option for many patients.

As of my knowledge cutoff in September 2021, sildenafil (generic Viagra) is available and is used to treat erectile dysfunction and pulmonary arterial hypertension. Remember to consult with a healthcare provider for specific medical advice and prescription information.