What information must be recorded in a pharmacy's controlled substances record keeping system?

The correct choice emphasizes the necessity for specific information to be meticulously documented in a pharmacy's controlled substances record-keeping system. This includes the date of purchase, the quantity of the controlled substance received, the name of the supplier, and the prescription number associated with the order.

Recording the date of purchase is vital for tracking when substances have entered the pharmacy, which aids in inventory management and regulatory compliance. The quantity received must be documented to maintain accurate inventory records, ensuring that the pharmacy does not exceed federal and state limits on stock. Additionally, noting the name of the supplier is crucial for accountability and traceability, enabling the pharmacy to confirm the legitimacy of the products received and to maintain a reliable source of controlled substances. Lastly, the prescription number is important as it ties the substance back to the specific patient or prescriber, allowing for better oversight and record management in patient care.

This thorough record-keeping is essential not only for operational efficiency but also for ensuring compliance with federal laws governing controlled substances, thereby preventing misuse and facilitating monitoring of substance distribution within the pharmacy. The other options do not provide the same depth or relevancy regarding the requirements stipulated by federal regulations for controlled substances.