Pharmacies must properly file and store records related to dispensing medications including: stamping Schedule III-V prescriptions with a red "C"; keeping narcotic invoices and forms; maintaining logs of exempt narcotic transactions, compounding records, poison logs, and repacked medication paperwork; and storing electronic or paper prescriptions for two years. Pharmacies must also conduct biennial narcotic inventories and use automatic stop orders for certain drug classes to limit prescriptions to specific time periods unless overridden by the doctor.