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PLoS By Category | Recent PLoS Articles
Geriatrics - Mental Health - Non-Clinical Medicine - Pharmacology - Public Health and Epidemiology

Inappropriateness of Medication Prescriptions to Elderly Patients in the Primary Care Setting: A Systematic Review
Published: Wednesday, August 22, 2012
Author: Dedan Opondo et al.

by Dedan Opondo, Saied Eslami, Stefan Visscher, Sophia E. de Rooij, Robert Verheij, Joke C. Korevaar, Ameen Abu-Hanna

Background

Inappropriate medication prescription is a common cause of preventable adverse drug events among elderly persons in the primary care setting.

Objective

The aim of this systematic review is to quantify the extent of inappropriate prescription to elderly persons in the primary care setting.

Methods

We systematically searched Ovid-Medline and Ovid-EMBASE from 1950 and 1980 respectively to March 2012. Two independent reviewers screened and selected primary studies published in English that measured (in)appropriate medication prescription among elderly persons (>65 years) in the primary care setting. We extracted data sources, instruments for assessing medication prescription appropriateness, and the rate of inappropriate medication prescriptions. We grouped the reported individual medications according to the Anatomical Therapeutic and Chemical (ATC) classification and compared the median rate of inappropriate medication prescription and its range within each therapeutic class.

Results

We included 19 studies, 14 of which used the Beers criteria as the instrument for assessing appropriateness of prescriptions. The median rate of inappropriate medication prescriptions (IMP) was 20.5% [IQR 18.1 to 25.6%.]. Medications with largest median rate of inappropriate medication prescriptions were propoxyphene 4.52(0.10–23.30)%, doxazosin 3.96 (0.32 15.70)%, diphenhydramine 3.30(0.02–4.40)% and amitriptiline 3.20 (0.05–20.5)% in a decreasing order of IMP rate. Available studies described unequal sets of medications and different measurement tools to estimate the overall prevalence of inappropriate prescription.

Conclusions

Approximately one in five prescriptions to elderly persons in primary care is inappropropriate despite the attention that has been directed to quality of prescription. Diphenhydramine and amitriptiline are the most common inappropriately prescribed medications with high risk adverse events while propoxyphene and doxazoxin are the most commonly prescribed medications with low risk adverse events. These medications are good candidates for being targeted for improvement e.g. by computerized clinical decision support.

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