This document discusses drug utilization reviews (DUR), also known as drug utilization evaluations (DUE) or medication utilization evaluations (MUE). DURs involve comprehensive review of patient prescription and medication data before, during, and after dispensing to ensure appropriate medication decisions and positive outcomes. DURs aim to promote optimal medication therapy, prevent medication-related problems, evaluate medication effectiveness, improve patient safety, and stimulate improvements in medication use processes. The document also outlines the value of DUR programs in helping health systems understand and improve prescribing, administration, and medication use.