Wyeth, formerly known as American Home Proucts (AHP), is one of the largest pharmaceutical companies in the world. The company is based in Madison, New Jersey. They are known for manufacturing the over-the-counter (OTC) drugs Robitussin and the analgesic Advil (ibuprofen), as well as the prescription drugs Premarin and Effexor, which both boast over $3 billion in sales annually.