New Animal Drugs; Phenylbutazone; Extralabel Animal Drug Use; Order of Prohibition

Resumen

The Food and Drug Administration (we) is issuing an order prohibiting the extralabel use of phenylbutazone animal and human drugs in female dairy cattle 20 months of age or older. We are issuing this order based on evidence that extralabel use of phenylbutazone in female dairy cattle 20 months of age or older will likely cause an adverse event in humans. We find that such extralabel use presents a risk to the public health for the purposes of the Animal Medicinal Drug Use Clarification Act of 1994 (AMDUCA).