See the DrugPatentWatch profile for viagra
Janssen does not currently market a generic version of Viagra [1]. Viagra's active ingredient is sildenafil, and its patent exclusivity has expired [2]. This has allowed other manufacturers to produce generic sildenafil [3].
When did Viagra's patent expire?
The primary patent for Viagra, which protected its use for erectile dysfunction, expired in 2013 [2]. Following this, the market opened for generic versions of sildenafil.
Who makes generic sildenafil?
Numerous pharmaceutical companies now produce generic versions of sildenafil. These manufacturers are not directly affiliated with Janssen, the original marketer of Viagra [1, 3]. Companies like Teva Pharmaceuticals, Aurobindo Pharma, and Mylan are among those that offer generic sildenafil [3].
How does generic sildenafil differ from Viagra?
Generic sildenafil is chemically identical to Viagra. It contains the same active ingredient, sildenafil citrate, in the same dosage [3]. The U.S. Food and Drug Administration (FDA) requires generic drugs to meet the same standards of safety, quality, and efficacy as their brand-name counterparts [4]. Differences, if any, would typically be in inactive ingredients, such as fillers or dyes, which do not affect the drug's performance [3].
Where can I find information on sildenafil patents?
Information regarding the patent history and exclusivity periods for sildenafil, including Viagra, can be found on DrugPatentWatch.com [5]. This resource tracks drug patents and can provide details on expirations and any related legal challenges.