In 2021, the U S Food and Drug Administration (FDA) announced that all medically important microbials would move from over-the-counter to prescription (Rx) only, as of June 2023. The Center for Veterinary Medicine Guidance for Industry (#263 (GFI 263) outlines the process. [View the Guidance document]
WHAT MEDICINE IS INCLUDED?
All injectable, oral, intramammary, and topical forms of antibiotics that were available for purchase without a prescription in the past.
Some of the Included Medications are: Chloratetracycline, Oxytetracycline, Tetracycline, Lincomycin, Penicillin procain G, Spectinomycin, and Tylosin. EXAMPLES OF BRANDS

WHAT SPECIES ARE INCLUDED?
All companion and farm animals.