(a) The executive commissioner shall adopt rules exempting from any labeling or packaging requirement of this chapter drugs and devices that are, in accordance with the practice of the trade, to be processed, labeled, or repacked in substantial quantities at establishments other than those where originally processed or packaged on condition that such drugs and devices are not adulterated or misbranded under the provisions of this chapter on removal from such processing, labeling, or repacking establishment.
(b) Drugs and device labeling or packaging exemptions adopted under the federal Act shall apply to drugs and devices in this state except insofar as modified or rejected by department rules.

(c)(1) A drug intended for use by man that:
(A) because of its toxicity or other potentiality for harmful effect, or the method of its use, or the collateral measures necessary to its use, is not safe for use except under the supervision of a practitioner licensed by law to administer such drug; or
(B) is limited by an approved application under Section 505 of the federal Act to use under the professional supervision of a practitioner licensed by law to administer such drug shall be dispensed only:
(i) on a written prescription of a practitioner licensed by law to administer such drug; or
(ii) on an oral prescription of such practitioner that is reduced promptly to writing and filed by the pharmacist; or
(iii) by refilling any such written or oral prescription if such refilling is authorized by the prescriber either in the original prescription or by oral order that is reduced promptly to writing and filed by the pharmacist. The act of dispensing a drug contrary to the provisions of this paragraph shall be deemed to be an act that results in a drug being misbranded while held for sale.
(2) Any drug dispensed by filling or refilling a written or oral prescription of a practitioner licensed by law to administer such drug shall be exempt from the requirements of § 431.112, except Sections 431.112(a)(1), (h)(2), and (h)(3), and the packaging requirements of Sections 431.112(f), (g), and (m), if the drug bears a label containing the name and address of the dispenser, the serial number and date of the prescription or of its filling, the name of the prescriber, and, if stated in the prescription, the name of the patient, and the directions for use and cautionary statements, if any, contained in such prescription. This exemption shall not apply to any drugs dispensed in the course of the conduct of business of dispensing drugs pursuant to diagnosis by mail, or to a drug dispensed in violation of Subdivision (1).
(3) A drug that is subject to Subdivision (1) shall be deemed to be misbranded if at any time prior to dispensing its label fails to bear at a minimum, the symbol “RX Only.” A drug to which Subdivision (1) does not apply shall be deemed to be misbranded if at any time prior to dispensing its label bears the caution statement quoted in the preceding sentence.