1. (a) “Compounding” means any of the following activities performed in a registered veterinary premises by a licensed veterinarian, who has established the veterinarian-client-patient relationship for the animal patient(s), or an R.V.T. under the direct or indirect supervision of that veterinarian:

   1. (1) Altering the dosage form or delivery system of a drug.
   2. (2) Altering the strength of a drug.
   3. (3) Combining components or active ingredients.
   4. (4) Preparing a compounded drug preparation from chemicals.
2. (b) “Compounding” also means preparing a compounded drug preparation from bulk substances by a licensed veterinarian, who has established a veterinarian-client-patient relationship for the animal patient or prepares the compounded drug preparation for office stock, or by an R.V.T. under the direct supervision of that veterinarian.

3. (c) “Compounding” does not include:

   1. (1) Reconstitution of a drug pursuant to a manufacturer's direction(s) for oral, rectal, topical, or injectable administration.
   2. (2) The sole act of tablet splitting or crushing or capsule opening.
   3. (3) Addition of flavoring agent(s) to enhance palatability.
4. (d) “Expiration date” means the date, or date and time, determined from the date the preparation is compounded, after which administration of a compounded drug preparation shall not begin, the preparation shall not be dispensed, and the preparation shall not be stored other than for quarantine purposes.
5. (e) “Immediate use” means administration of a sterile compounded drug preparation to an animal patient beginning within four hours from the time the drug preparation was compounded.
6. (f) “Office stock” means a compounded drug prepared without a patient-specific prescription that may be administered to an animal patient within the registered veterinary premises where the drug preparation was compounded or administered in mobile units and vehicles operated from the registered veterinary premises in accordance with section 4853 of the code, or dispensed only to a client, client's authorized agent, or other veterinarian at the same veterinary premises.

Note: Authority cited: Sections 4808 and 4826.5, Business and Professions Code. Reference: Section 4826.5, Business and Professions Code.

History

1. New article 11 (sections 2090-2095) and section filed 1-4-2022; operative 4-1-2022 (Register 2022, No. 1). (OAL review extended 60 calendar days pursuant to Executive Order N-40-20.)

2. Amendment of section and Note filed 1-12-2026; operative 4-1-2026 (Register 2026, No. 3).