Nothing in this chapter shall be construed to prevent, or in any manner interfere with, or to require a permit for the sale of nonnarcotic nonprescription drugs which may be lawfully sold under the United States Food, Drug and Cosmetic Act (21 USCS 301 et seq. as now or hereafter amended) without a prescription, nor shall any rule or regulation be adopted by the board under the provisions of this chapter which shall require the sale of nonprescription drugs by a licensed pharmacist of in a pharmacy or otherwise apply to or interfere with the sale or distribution of such drugs.