Pfizer manufactures some of the best-selling pharmaceutical products worldwide. Lipitor was Pfizer’s top drug for many years, but lost its patent in May 2012. Thus, Lipitor’s revenue decreased from around 10 billion U.S. dollars in 2011 to some 1.8 billion U.S. dollars in 2016. Other well-known drugs produced by Pfizer are Lyrica, Enbrel and Viagra. Until 2013, the company also had a notable animal health product line. Pfizer generates around half of its revenue within the United States.
As is common practice in the pharmaceutical industry, Pfizer spends a substantial part of its revenue on research and development. In 2018, the company’s R&D expenditure stood at some eight billion U.S. dollars, or around 15 percent of its total revenue. With over 92 thousand employees in 2018, Pfizer is also a significant employer all over the world.