The manufacturer of Premarin was purchased by Pfizer in what year?
Wyeth Wyeth was a pharmaceutical company purchased by Pfizer in 2009. The company was founded in Philadelphia, Pennsylvania, in 1860 as John Wyeth and Brother. It was later known as American Home Products before being renamed to Wyeth in 2002. 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. The infant and maternal nutrition business was acquired by Nestlé in 2012.
Herron Pharmaceuticals Herron Pharmaceuticals Pty Ltd is an Australian manufacturer of pharmaceutical and natural healthcare items. Herron is a subsidiary of Sigma Pharmaceuticals which was founded in 1912.