When the pharmacist dispenses, with the practitioner's authorization, a therapeutically equivalent drug product, the following information shall be noted:

(a) On oral prescriptions, the pharmacist shall indicate on the permanent prescription record, if substitution is permitted.

(b) The manufacturer or distributor of the drug product actually dispensed or its national drug code number or short name code or trade name shall be noted on the permanent record, or on the patient medication record if this document is utilized for providing and recording refills. This requirement shall also apply to refill prescriptions when a different distributor or manufacturer's product is used.

(c) The generic or trade name of the drug actually dispensed shall be noted on the prescription label or package label. For combination drug products, the generic names of the drugs combined or the trade name of the manufacturer or distributor shall be noted on the prescription label. For prescriptions compounded with multiple ingredients, the label designation will be left to the discretion of the pharmacist.

(d) For institutionalized and closed system patients, the pharmacist may identify the manufacturer or distributor of the product actually dispensed through pharmacy purchasing records or packaging records, and a published formulary designation may be used on the label.