Drug stocks slide as broader market tumbles

/quotes/comstock/13*!sny/quotes/nls/sny (SNY 31.86, -0.89, -2.72%) , Pfizer Inc. /quotes/comstock/13*!pfe/quotes/nls/pfe (PFE 16.63, -0.55, -3.20%) , Allergan Inc. /quotes/comstock/13*!agn/quotes/nls/agn (AGN 60.56, -2.26, -3.60%) , Bayer AG...