Pfizer’s original patent for Viagra (sildenafil citrate) expired in various countries at different times. In the United States, the primary patent expired in 2012. This allowed generic versions of the drug to enter the market.
However, Pfizer held additional patents covering specific aspects of Viagra’s production and formulation. These extended their exclusive rights for a time. Consequently, the widespread availability of generic sildenafil wasn’t immediate in all regions.
Therefore, while the initial patent’s expiry in 2012 was a significant event, the full impact on generic drug availability varied depending on the country’s patent laws and specific patent holdings. Check your local regulations or consult a pharmacist for updated information.
Keep in mind that the brand name Viagra and generic sildenafil are chemically identical; only the price and branding differ. Generic versions offer a cost-effective alternative, providing similar efficacy and safety.
