Pfizer develops and produces medicines and vaccines for a wide range of medical disciplines, including immunology, oncology, cardiology, diabetology/endocrinology, and neurology. Pfizer’s products include the blockbuster drug Lipitor (atorvastatin), used to lower LDL blood cholesterol; Lyrica (pregabalin for neuropathic pain/fibromyalgia); Diflucan (fluconazole), an oral antifungal medication; Zithromax (azithromycin), an antibiotic; Viagra (sildenafil, for erectile dysfunction); and Celebrex/Celebra (celecoxib), an anti-inflammatory drug.
Pfizer was founded by cousins Charles Pfizer and Charles F. Erhart in New York City in 1849 as a manufacturer of fine chemicals. Pfizer’s discovery of Terramycin (oxytetracycline) in 1950 put it on a path towards becoming a research-based pharmaceutical company. Pfizer has made numerous acquisitions, including Warner–Lambert in 2000, Pharmacia in 2003 and Wyeth in 2009. The Wyeth acquisition was the largest of the three at US$68 billion Pfizer is listed on the New York Stock Exchange, and its shares have been a component of the Dow Jones Industrial Average since April 2004.