Drug-related problems among older people with dementia: a systematic review.

Medication-related problems (including adverse drug events, medication errors, and potentially inappropriate prescribing) among patients with dementia or cognitive impairment can contribute to functional decline and poor outcomes. This systematic review of 15 studies found that the prevalence of medication-related problems among patients with dementia or cognitive impairments varied widely, from 9.1% to 83.6%.