cliffordfosterr
Guest
Jul 10, 2025
3:14 AM
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The active ingredient in Silditop 100 is Sildenafil citrate, the same compound used in brand-name Viagra. This means its patent status closely mirrors that of Viagra—and is not specific to Silditop 100 mg itself. The patent situation for “Silditop 100” is essentially tied to its active ingredient, sildenafil citrate — the generic form of Pfizer’s Viagra. To determine its likely patent expiry, let's look at key dates for sildenafil: Pfizer’s original sildenafil patent expired in the U.S. in March 2012, having initial protection plus a patent-term extension. Pfizer held a secondary method-of-use patent covering its use for erectile dysfunction, which ran until October 22, 2019, and was further extended by pediatric exclusivity to April 22, 2020. In April 2020, all key U.S. patents protecting Viagra officially expired, making sildenafil open to generic competition .
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