The U.S. FDA is cracking down on lax testing practices by dozens of makers of healthcare products following hundreds of deaths overseas from contaminated cough syrups, a Reuters review of regulatory alerts found. The Food and Drug Administration has reprimanded at least 28 companies this year, saying they failed to prove sufficient testing of ingredients used in over-the-counter drugs and consumer products for the toxins ethylene glycol (EG) and diethylene glycol (DEG), according to a Reuters analysis of agency import alerts and warning letters to manufacturers.