This industry comprises establishments known as pharmacies and drug stores engaged in retailing prescription or nonprescription drugs and medicines. Cross-References. Establishments primarily engaged in-- ? Retailing food supplement products, such as vitamins, nutrition supplements, and body enhancing supplements--are classified in U.S. Industry 446191, Food (Health) Supplement Stores; and ? Retailing prescription and nonprescription drugs via electronic home shopping, mail-order, or direct sale--are classified in Subsector 454, Nonstore Retailers.