Patient risk factors for opioid-related adverse drug events in hospitalized patients: A systematic review.

Introduction: Opioid utilization has increased fourfold over the past two decades among developed countries. Previous studies have found that opioid-related adverse drug events (ORADEs) are strongly associated with adverse clinical outcomes in hospitalized patients. The Society of Hospital Medicine in the United States recently published a Consensus Statement regarding opioid safety and suggested that extra caution is needed when using opioids in patients with risk factors for ORADEs.