Final answer:
An inventory of controlled substances must be taken on the date of transfer of ownership or on the day of closure of the business, complying with DEA requirements. The exact timing can depend on contractual and logistical factors.
Step-by-step explanation:
When a pharmacy, hospital, or other dispenser of controlled substances undergoes a change of ownership, the Drug Enforcement Administration (DEA) requires that an accurate inventory of all controlled substances be taken. This inventory should be taken on the date of transfer of ownership. The new owner has to do the initial controlled substance inventory on the day they begin business under the new ownership. Should the pharmacy close entirely, a final controlled substance inventory must be conducted on the day the business closes. The Controlled Substances Act and DEA regulations do not specify a particular timeframe for when this inventory must be taken before transferring ownership. However, it is clear that compliance with proper documentation is essential for the transfer or closure process. Therefore, the exact timing may depend on contractual and logistical considerations between the parties involved.