Which of the following is NOT a responsibility of a pharmacist when handling controlled substances?

In the context of handling controlled substances, pharmacists have specific responsibilities to ensure compliance with federal and state laws, as well as to maintain patient safety and the integrity of the medication distribution process. Among these responsibilities, filling prescriptions without verifying insurance payment is not a duty that falls within the scope of a pharmacist's responsibilities.

Pharmacists are expected to ensure that prescriptions are filled accurately and legally, which includes verifying payment methods and coverage. This step is crucial for identifying potential issues such as prescription fraud, patient safety concerns, or the appropriateness of therapy based on a patient’s insurance plan. Failing to verify insurance payment could lead to financial discrepancies, potential loss to the pharmacy, and complicate medication access for patients.

In contrast, documenting all controlled substance purchases, ensuring proper storage of medications, and keeping accurate inventory logs are all integral components of a pharmacist’s responsibilities. These tasks help ensure that controlled substances are handled safely and lawfully, safeguarding against misuse and maintaining precise records to comply with regulatory requirements. Thus, the choice regarding filling prescriptions without insurance verification clearly distinguishes itself as not being a responsibility of a pharmacist when handling controlled substances.