Mylan, Merck, Bayer lead drug stocks higher By: MarketWatch July 30, 2009 at 10:35 AM EDT Mylan leads drug stocks into positive territory as shares of the generic drugmaker gain on a solid second-quarter earnings report. Read More >> Related Stocks: Astrazeneca Plc ADR Bayer Aktienges ADR Sanofi-Aventis S.A. ADR