Abstract

BackgroundThe aim of this systematic review and meta-analysis was to analyse the efficacy of azithromycin in acute bronchiolitis and wheezing.MethodsPubMed, Scopus, and Web of Science databases were searched for randomized controlled trials comparing azithromycin to placebo in children <2 years of age. Main outcomes were progress of acute wheezing episode and recurrence of wheezing. We used random-effects model to calculate mean difference (MD) with 95% confidence interval (CI) or risk ratios (RR) with CI.ResultsWe screened 1604 abstracts and included 7 studies. Risk of bias was low in three and had some concerns in four studies. Need for intensive care unit treatment was assessed in four studies (446 children) and the risk difference was 0.0% (CI –2.0 to 2.0; low quality evidence). Hospitalization duration was –0.27 days shorter in the azithromycin group (MD-0.27, CI –0.47 to –0.07; three studies; moderate quality evidence). Azithromycin did not prevent recurrence of wheezing (RR 0.84, CI 0.45–1.56; three studies), hospital readmissions (RR 1.14, CI 0.82–1.60; four studies).ConclusionsWe found moderate quality evidence that azithromycin may reduce hospitalization duration. Low certainty evidence suggests that azithromycin does not reduce the need for intensive care unit treatment. Furthermore, azithromycin did not prevent wheezing recurrence.ImpactAzithromycin may reduce hospitalization time in acute bronchiolitis and wheezing episodes among children aged less than two.Azithromycin administrated during the acute wheezing period, does not have preventive effect on wheezing recurrence.Azithromycin seemed to have similar adverse event profile than placebo.Future studies with clinically relevant outcomes, and sufficient sample sizes are needed, before implementing azithromycin into clinical use.

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