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. The manufacturers include U.S.-based companies and exporters from India, South Korea, Switzerland, Canada and Egypt.