Va. Code Ann. § 54.1-3409

A veterinarian may not prescribe controlled substances for human use and shall only prescribe, dispense or administer a controlled substance in good faith for use by animals within the course of his professional practice. He may prescribe, on a written prescription or on oral prescription as authorized by § 54.1-3410. He may administer drugs, and he may cause them to be administered by an assistant or orderly under his direction and supervision. Such a prescription shall be dated and signed by the person prescribing on the day when issued, and shall bear the full name and address of the owner of the animal, and the species of the animal for which the drug is prescribed and the full name, address and registry number, under the federal laws of the person prescribing, if he is required by those laws to be so registered.