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Antipsychotic drug use and pneumonia: Systematic review and meta-analysis

O. Dzahini, N. Singh, D. Taylor, P. Haddad

Journal of Psychopharmacology, 2018

78 citations

Abstract

Objectives: The purpose of this study was to investigate the association of antipsychotic exposure to the incidence and mortality of pneumonia. Methods: The design of this study involved meta-analysis of observational studies identified from electronic databases. Results: In total, 19 studies were included in the systematic review and 14 in the meta-analysis. Risk of pneumonia was increased by first-generation antipsychotics (risk ratio 1.69, 95% confidence interval 1.34–2.15; five studies), second-generation antipsychotics (risk ratio 1.93, 95% confidence interval 1.55–2.41; six studies) and all antipsychotics (risk ratio 1.83, 95% confidence interval 1.60–2.10; seven studies) compared with no antipsychotic use. Pneumonia risk did not differ in seven studies comparing first-generation antipsychotics with second-generation antipsychotics (risk ratio 1.07, 95% confidence interval 0.85–1.35). Case fatality rate was not different in pneumonia cases associated with antipsychotic exposure versus cases without exposure (risk ratio 1.50; 95% confidence interval 0.76–2.96; two studies). All antipsychotics with data from ⩾2 studies allowing meta-analysis, were associated with a significantly increased pneumonia risk (i.e. haloperidol, olanzapine, clozapine, risperidone, quetiapine, zotepine). Conclusion: Exposure to both first-generation antipsychotics and second-generation antipsychotics is associated with an increased pneumonia risk. Clinicians need to be vigilant for the…

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