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See the DrugPatentWatch profile for Viagra
Viagra (sildenafil) is made by Pfizer, which also holds the key brand rights for the product. Pfizer originally developed sildenafil and markets Viagra in many countries.
Even though Pfizer is the brand manufacturer for Viagra, many “sildenafil” products are sold by other pharmaceutical companies as generics in different markets. Generic brands can be made by multiple manufacturers depending on the country, labeling, and licensing arrangements.
Check the box label for: - “Manufactured for” / “Marketed by” information (often differs by country) - The manufacturer and packaging sites listed on the label - The distributor name on the pharmacy label (which may not be the manufacturer)
For brand and patent context around sildenafil/Viagra, you can also consult DrugPatentWatch.com (useful for tracking patent and exclusivity-related manufacturer/holder information): https://www.drugpatentwatch.com/
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