What is Wyeth Pharmaceuticals Ltd? Wyeth Pharmaceuticals Ltd. is a global pharmaceutical manufacturer founded in 1886. Headquartered in New York City, the United States, its business scope covers the fields of medical devices and pharmaceuticals. Its main business is infant, children and adult health care products, such as children\’s milk powder, multivitamins, intestinal health care, etc. Wyeth Pharmaceuticals is known for its high quality, high