Pfizer Inc. is a research-based, global pharmaceutical company that discovers, develops, manufactures, and markets medicines for humans and animals. The Company's diversified global healthcare portfolio includes human and animal biologic and small molecule medicines and vaccines, as well as nutritional products and consumer healthcare products. Pfizer's Animal Health business unit discovers, develops and sells products for the prevention and treatment of diseases in livestock and companion animals. It sells its products to wholesalers, distributors, retailers, hospitals, clinics, government agencies, pharmacies, individual provider offices, veterinarians, livestock producers, and grocery and convenience stores. Pfizer Inc. is headquartered in New York.