(1) All licensees of the commission who dispense legend drugs to outpatients shall affix a label to the prescription container that meets the requirements of RCW 69.41.050 and 18.64.246, and shall also include:

(a) Drug quantity;

(b) The number of refills remaining, if any;

(c) The following statement, "Warning: State or federal law prohibits transfer of this drug to any person other than the person for whom it was prescribed.", except when dispensing to an animal, when a warning sufficient to convey "for veterinary use only" may be used;

(d) The name and species of the patient, if a veterinary prescription; and

(e) The name of the facility or entity authorized by law to possess a legend drug, if patient is the facility or entity.

(2) In addition to the requirements in subsection (1) of this section, a compounded product must meet the applicable labeling requirements of USP chapters <795˃, <797˃, <800˃, and <825˃. For compounded products, the BUD shall be equivalent to the expiration date required by RCW 18.64.246.

(3) For the purposes of determining an expiration date as required in RCW 18.64.246, the dispenser shall take the following factors into account:

(a) The nature of the drug;

(b) The container in which it was packaged by the manufacturer and the expiration date;

(c) The characteristics of the patient's container, if the drug is repackaged for dispensing;

(d) The expected conditions to which the drug may be exposed;

(e) The expected length of time of the course of therapy; and

(f) Any other relevant factors.