Exclusive: FDA says working with Merck, USDA on cattle drug Zilmax

WASHINGTON (Reuters) - The U.S. Food and Drug Administration on Friday said it was working with drugmaker Merck & Co and the U.S. Department of Agriculture to gather information on the cattle feed additive Zilmax and determine if it poses a safety issue. The FDA, in an email response to a Reuters query, said it had received "a very small number of reports of lameness or lying down" in cattle whose feed contained zilpaterol, or Zilmax. ...



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