What is a VFD drug?

• A. A drug intended for use in or on animal feed which is limited by a CVM approved application to use under the professional supervision of a licensed veterinarian
• B. A human medicine that can be used in animals with no prescription
• C. A drug used only in water, not in feed
• D. A feed additive that requires no veterinary oversight

Answer: (A)

A VFD drug is a medicated feed additive that can be used in or on animal feed only under a Veterinary Feed Directive: a CVM-approved authorization that requires supervision by a licensed veterinarian. The veterinarian issues a VFD order that specifies the drug, the species and production class, the dosage and duration, and the withdrawal time. The feed mill or feed manufacturer may only use the drug according to that order. This mechanism exists to ensure appropriate medical use and oversight, especially for antimicrobial drugs, and to prevent misuse.

So this fits best because it emphasizes use in feed and the required veterinary oversight under a CVM-approved directive. It’s not a human medicine used without prescription, not restricted merely to water, and it isn’t a feed additive that bypasses veterinary review.