Medication reconciliations, including conducting a best possible medication history (BPMH), may occur multiple times during a hospital stay, especially at admission and discharge. By conducting BPMH analysis of 372 hospitalized older adults taking at least 5 medications at admission, researchers found that nearly 90% had at least one discrepancy. Lower age, total prehospital medication count, and admission from a non-home setting were statistically associated with more discrepancies.