Amends the Controlled Substances Act to remove dihydrocodeinone (hydrocodone) from classification as a schedule III controlled substance. Directs the Attorney General to immediately allow manufacturers and distributors to store hydrocodone compound products in accordance with the physical security requirements for schedule III, IV, and V controlled substances for three years beginning on the date enactment of this Act. Requires the Comptroller General to submit a report on the reclassification of hydrocodone products under this Act, including: