Abstract

Residents of residential aged care facilities (RACFs) have a high prevalence of use of potentially inappropriate medications (PIMs) and resultant medicines-related harm. This study investigated the effect of an on-site pharmacist model on PIMs use and other medication outcomes for residents in RACFs. A multi-facility, non-blind, cluster randomised controlled trial, with randomisation at the facility level, was conducted. Fifteen facilities enrolled and participated in the study, 7 facilities (560 residents) were allocated to the intervention arm and 8 facilities (737 residents) were allocated to the control arm. Each facility in the intervention arm employed an on-site pharmacist for 12 months to perform medication management activities as part of an interdisciplinary care team. The primary outcome was the proportion of residents taking at least one PIM according to the 2019 Beers® Criteria. Using generalised linear mixed-effects models, accounting for confounders and clustering, there was a significant reduction in the proportion of residents prescribed at least one PIM (odds ratio 0.50, 95% confidence interval, 0.335–0.750; p = 0.001) in the intervention arm. There were also significant decreases in the Anticholinergic Cognitive Burden scale and chlorpromazine equivalent daily dose of antipsychotics. The on-site pharmacist intervention significantly improved the appropriateness of medicines use in RACFs.

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