title: FDA tightens screws on extra-label drug use, liberalizes policy on use of human drugs in animals.
authors.forename: J S
authors.initials: JS
authors.lastname: Gloyd
mesh_terms: D000818:Animals; D017277:Drug Approval; D004350:Drug Residues; D007880:Legislation, Drug; D014481:United States; D014486:United States Food and Drug Administration