During this period, the FDA and independent researchers warned against "generic" versions being sold online. Because Pfizer held the U.S. patent until 2020, any "generic Viagra" sold in the U.S. in 2013 was legally nonexistent and likely fake . Confiscated counterfeit pills were found to contain dangerous ingredients, including: Blue printer ink used to mimic the authentic color.
While the 2013 direct-sale model was revolutionary, the market has since changed drastically: Pfizer Begins Selling Viagra Online - The New York Times buy viagra 2013 usa
Authentic brand-name Viagra remained expensive, retailing for roughly $25 per pill . Critical Risks of Unofficial Sources During this period, the FDA and independent researchers
The move was primarily designed to combat a massive black market where an estimated 77% of Viagra bought from non-official online pharmacies was counterfeit. in 2013 was legally nonexistent and likely fake