(1) An apothecary, in good faith, may sell and dispense narcotic drugs to any person upon a written prescription or an oral prescription in pursuance to regulations, promulgated by the Director of the Department of Health under authority of § 20-64-219, of a physician, dentist, or veterinarian, dated and signed by the person prescribing on the day when issued and bearing the full name and address of the patient for whom, or the owner of the animal for which, the drug is dispensed, and the full name, address, and registry number under the federal narcotic laws of the person prescribing. If the prescription is for an animal, it shall state the species of animal for which the drug is prescribed. The person filling the prescription shall write the date of filling and his own signature on the face of the prescription. The prescription shall be retained on file by the proprietor of the pharmacy in which it is filled for a period of two (2) years, so as to be readily accessible for inspection by any public officer or employee engaged in the enforcement of this subchapter. The prescription must not be refilled.

(2) The legal owner of any stock of narcotic drugs in a pharmacy, upon discontinuance of dealing in said drugs, may sell said stock to a manufacturer, wholesaler, or apothecary, but only on an official written order.

(3) An apothecary, only upon an offical written order, may sell to a physician, dentist, or veterinarian, in quantities not exceeding one (1) ounce at any one time, aqueous or oleaginous solutions of which the content of narcotic drugs does not exceed a proportion greater than twenty percent (20%) of the complete solution, to be used for medical purposes.