Older adults are particularly vulnerable to medication-related safety events. This systematic review including 21 studies on medication-related problems in in older adults identified several types of safety issues (e.g., potentially inappropriate prescribing, polypharmacy, adverse drug reactions) that lead to poor outcomes among older adults in nursing homes, inpatient care, and community settings. The authors found the classes of medication related problems are similar to studies from a decade ago, suggesting that more intensive monitoring is needed.