A nurse is completing the admission paperwork for a patient with a history of heart failure and diabetes. Which of the following actions should the nurse PRIORITIZE to ensure accurate medication reconciliation?

Accurate medication reconciliation requires cross-referencing multiple sources to confirm the complete and correct list of a patient's current home medications. Verifying the home medication list with pharmacy records is the highest-priority action because pharmacies maintain up-to-date dispensing histories that reflect what the patient has actually been prescribed and filled, including dosages, frequencies, and recent changes. This source is more reliable than either the patient's self-report or older records alone. Reviewing the electronic health record for previously prescribed medications is a useful step but may not capture recent changes, medications prescribed by other providers, or over-the-counter drugs. Asking the patient to describe each medication is important for gathering subjective information, but patients frequently make errors in naming drugs, dosages, or schedules, especially when managing multiple chronic conditions. Relying solely on the patient's most recent discharge summary is problematic because it reflects medications at discharge rather than what the patient is currently taking at home; adjustments may have been made since then. Combining the pharmacy record verification with patient interview and EHR review constitutes best practice, but of the options provided, pharmacy verification offers the most objective and current data source.