What information about previously dispensed drugs must be maintained for patients?

The correct choice highlights the essential information that pharmacies must retain concerning previously dispensed medications for patients. It includes the name of the drug, the prescription (RX) number, the strength of the medication, the quantity dispensed, the date on which it was received, and the name of the prescriber. This comprehensive set of data is crucial for multiple reasons.

First, maintaining detailed records helps ensure continuity of care. Healthcare providers can access this information to make informed decisions regarding ongoing treatment and to monitor drug interactions with new prescriptions. Furthermore, having the RX number allows for quick identification of the specific medication dispensed, facilitating easier tracking and reference if issues arise.

Additionally, recording the prescriber’s name is vital for accountability and to assist in any necessary communications regarding the patient's treatment plan. The strength and quantity of the medication dispensed are also essential for ensuring proper dosing and adherence to treatment protocols.

This level of detail is necessary to comply with legal and regulatory requirements governing pharmacy practice, as well as to protect patient safety and health outcomes. Overall, choice B encompasses the critical data elements required to effectively manage a patient's medication history while adhering to legal standards.