Pfizer, founded in 1849, is one of the largest research-based pharmaceuticals companies in the United States. The company s areas of expertise include human and animal health, and consumer health care products. Its human health segment offers medicines for cardiovascular and metabolic diseases, central nervous system disorders, arthritis and pain, infectious and respiratory diseases, urogenital conditions, cancer, eye diseases and allergies. The consumer health care segment produces and markets various medications for oral care, upper respiratory and gastrointestinal health, tobacco dependence, skin and eye care, and hair growth. The company s animal health division develops products for the prevention and treatment of diseases in livestock and companion animals. The products offered by the division include parasiticides, anti-inflammatories, vaccines, and antibiotics. The company s well-known brands include Sudafed, Listerine, Benadryl, Lipitor, Diflucan, Zithromax, Viagra and Celebrex. It also produces pharmaceutical chemicals and gelatin capsules, and offers contract-manufacturing services.