Drug stocks sag as Amgen climbs on upgrade By: MarketWatch March 27, 2009 at 09:25 AM EDT Drug stocks sag in early trading Friday while shares of Amgen Inc. rise on an upgrade from J.P. Morgan. Read More >> Related Stocks: Amgen Bayer Aktienges ADR Gsk Plc ADR Novartis Ag ADR Novo Nordisk A/S ADR Osiris Therapeutics Sanofi-Aventis S.A. ADR Shire Plc Ads