Biggest selling drugs with patent at threat in the U.S. in 2017, by revenue
This statistic shows the leading drugs that will go off patent in 2017 in the U.S., by 2016 revenue, in million U.S. dollars. In 2017, Pfizer's Viagra, which generated U.S. revenues of some 1.2 billion dollars in 2016, will go off patent. When pharmaceutical drugs lose their patents it is possible for drug makers to make generic versions of the drug.