Sales of antimicrobial drugs for livestock use by dispensing status in U.S. 2021

Including only medically important antimicrobial drugs. Includes antimicrobial drug applications which are approved and labeled for use in both food-producing animals (e.g., cattle and swine) and nonfood-producing animals (e.g., dogs and cats).
In kilogram of active ingredient. Antimicrobials which were reported in International Units (IU) (e.g., Penicillins) were converted to kg. Antimicrobial class includes drugs of different molecular weights, with some drugs reported in different salt forms.

OTC: Over-The-Counter. Approved animal drugs that are available without a prescription or veterinary feed directive.
Rx = Prescription. Approved animal drugs that require a prescription from a licensed veterinarian.
Animal drugs that were approved with both a prescription and OTC dispensing status (Rx/OTC), with the approved drug being marketed with either a prescription label or an OTC label, depending upon the species and indication on the label.
VFD: Veterinary Feed Directive. Approved animal drugs that are intended for use in or on animal feed and must be used under the professional supervision of a licensed veterinarian.