https://www.avma.org/blog/medically-important-antibiotics-move-otc-rx By June 2023, all medically important antibiotics will require veterinary oversight to be used in animals, even if the animals are not intended for food production. Examples of affected products include injectable penicillin and oxytetracycline. Though the guidance provides for a two-year implementation period, some products may change to Rx in 2022