Any person licensed under this [Medical Practice] Act to practice medicine in all of its branches shall be authorized to purchase legend drugs requiring an order of a person authorized to prescribe drugs, and to dispense such legend drugs in the regular course of practicing medicine. The dispensing of such legend drugs shall be the personal act of the person licensed under this Act and may not be delegated to any other person not licensed under this Act or the Pharmacy Practice Act unless such delegated dispensing functions are under the direct supervision of the physician authorized to dispense legend drugs. Except when dispensing manufacturers' samples or other legend drugs in a maximum 72 hour supply, persons licensed under this Act shall maintain a book or file of prescriptions as required in the Pharmacy Practice Act. Any person licensed under this Act who dispenses any drug or medicine shall dispense such drug or medicine in good faith and shall affix to the box, bottle, vessel or package containing the same a label indicating (1) the date on which such drug or medicine is dispensed; (2) the name of the patient; (3) the last name of the person dispensing such drug or medicine; (4) the directions for use thereof; and (5) the proprietary name or names or, if there are none, the established name or names of the drug or medicine, the dosage and quantity, except as otherwise authorized by regulation of the Department. see full law

“Good faith” means the prescribing or dispensing of a controlled substance by a practitioner in the regular course of professional treatment to or for any person who is under his or her treatment for a pathology or condition other than that individual's physical or psychological dependence upon or addiction to a controlled substance, except as provided herein: and application of the term to a pharmacist shall mean the dispensing of a controlled substance pursuant to the prescriber's order which in the professional judgment of the pharmacist is lawful. The pharmacist shall be guided by accepted professional standards including, but not limited to the following, in making the judgment: see full law