COLLEGEVILLE, Pa. & TARRYTOWN, N.Y.--(BUSINESS WIRE)--Wyeth Pharmaceuticals, a division of Wyeth (NYSE: WYE), and Progenics Pharmaceuticals, Inc. (NASDAQ: PGNX) today announced the initiation of three new clinical studies for their investigational drug, methylnaltrexone, a peripherally acting mu-opioid receptor antagonist.
