Sanofi, Bayer lead drug-stocks slide By: MarketWatch July 11, 2011 at 10:59 AM EDT Sanofi, Bayer lead drug-stocks lower as broader market slides on concerns about the U.S. job market and Italy’s debt situation. Read More >> Related Stocks: Amgen Bayer Aktienges ADR Pfizer Sanofi-Aventis S.A. ADR