• Tesfay Mehari Atey, Gregory M Peterson, Mohammed Saji Salahudeen, Luke R Bereznicki, and Barbara C Wimmer.
• School of Pharmacy and Pharmacology, University of Tasmania, Hobart, Tasmania, Australia tesfaymehari.atey@utas.edu.au.
• Emerg Med J. 2023 Feb 1; 40 (2): 120127120-127.

BackgroundPharmacists have an increasing role as part of the emergency department (ED) team. However, the impact of ED-based pharmacy interventions on the quality use of medicines has not been well characterised.ObjectiveThis systematic review aimed to synthesise evidence from studies examining the impact of interventions provided by pharmacists on the quality use of medicines in adults presenting to ED.MethodsA systematic literature search was conducted in MEDLINE, EMBASE and CINAHL. Two independent reviewers screened titles/abstracts and reviewed full texts. Studies that compared the impact of interventions provided by pharmacists with usual care in ED and reported medication-related primary outcomes were included. Cochrane Risk of Bias-2 and Newcastle-Ottawa tools were used to assess the risk of bias. Summary estimates were pooled using random-effects meta-analysis, along with sensitivity and sub-group analyses.ResultsThirty-one studies involving 13 242 participants were included. Pharmacists were predominantly involved in comprehensive medication review, advanced pharmacotherapy assessment, staff and patient education, identification of medication discrepancies and drug-related problems, medication prescribing and co-prescribing, and medication preparation and administration. The activities reduced the number of medication errors by a mean of 0.33 per patient (95% CI -0.42 to -0.23, I2=51%) and the proportion of patients with at least one error by 73% (risk ratio (RR)=0.27, 95% CI 0.19 to 0.40, I2=85.3%). The interventions were also associated with more complete and accurate medication histories, increased appropriateness of prescribed medications by 58% (RR=1.58, 95% CI 1.21 to 2.06, I2=95%) and quicker initiation of time-critical medications.ConclusionThe evidence indicates improved quality use of medicines when pharmacists are included in ED care teams.Prospero Registration NumberCRD42020165234.© Author(s) (or their employer(s)) 2023. No commercial re-use. See rights and permissions. Published by BMJ.

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