The manufacturer of Premarin was purchased by Pfizer in what year?
Premarin Premarin is the brand name for an estrogen medication that consists of conjugated estrogens isolated from the urine of pregnant mares (pregnant mares' urine). It is manufactured by Wyeth (now a part of Pfizer), and was first marketed in 1941 and 1942 in Canada and the United States, respectively, for the treatment of menopausal symptoms.
Nereus Pharmaceuticals Nereus Pharmaceuticals was a pharmaceutical company focused on the development of natural products from marine microbial and other natural sources into small molecule human therapeutics. The major disease area addressed by Nereus is cancer. Nereus was purchased by Triphase Research and Development in 2012.