What must be recorded in a bound record book for controlled substance purchases?

The requirement to record the name and address of the purchaser in a bound record book for controlled substance purchases is rooted in regulatory compliance. This practice serves several critical purposes. Primarily, it supports the accountability and traceability of controlled substances, which are highly regulated due to their potential for abuse and misuse. By documenting the purchaser's identity and address, pharmacies and wholesalers can maintain an accurate record that can be reviewed during inspections or audits by regulatory boards.

Additionally, this information is vital for tracking patterns of substance use and preventing illegal distribution. Accurate records may also assist in investigations when there are concerns about diversion or illegal sales. Collecting the purchaser's details ensures that the transactions involving controlled substances are properly monitored and verifiable.

The other choices, while they may have relevance in specific contexts or practices, do not fulfill the regulatory requirements set forth by laws governing controlled substances to the same degree as recording the purchaser's name and address does.