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The U.S. FDA has announced that Pfizer will stop the sale of the animal drug 3-Nitro. The drug is used in chicken feed, but an agency analysis detected inorganic arsenic in the livers of chickens treated with the drug.
3-Nitro is used to help control coccidiosis, a parasitic disease that affects the intestinal tracts of animals, and also so that the chickens will gain more weight.