Wyeth was a pharmaceutical company until it was purchased by Pfizer in 2009. The company was founded in Philadelphia, Pennsylvania, in 1860 as John Wyeth and Brother. Its headquarters moved to Collegeville, Pennsylvania, and Madison, New Jersey, before its headquarters were consolidated with Pfizer's in New York City after the 2009 merger.Wyeth manufactured over-the-counter (OTC) drugs Robitussin and the analgesic Advil (ibuprofen) as well as prescription drugs Premarin and Effexor.