• Maria Vargas, Pasquale Buonanno, Carmine Iacovazzo, and Giuseppe Servillo.
• Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples "Federico II", Naples, Italy. Electronic address: vargas.maria82@gmail.com.
• Resuscitation. 2019 Mar 1; 136: 546054-60.

ObjectiveTo evaluate the effectiveness of epinephrine, compared with control treatments, on survival at admission, ROSC, survival at discharge, and a favorable neurologic outcome in adult patients during OHCA.Data SourceMEDLINE and PubMed from inception to August 2018.Study SelectionRandomized controlled trials (RCTs) on adult patients after OHCA treated with epinephrine versus controls.Data ExtractionIndependent, double-data extraction; risk of bias assessment with Cochrane Collaboration's criteria.Data Synthesis15 RCTs representing 20 716 OHCA adult patients. Epinephrine, compared with all pooled treatments, was associated with a better survival rate to hospital discharge (RR: 1.16, 95% CI: 1.00-1.35) and a favorable neurologic outcome (RR: 1.24, 95% CI: 1.04-1.48). No difference was found in survival to hospital admission (RR: 1.02, 95% CI: 0.75-1.38) and ROSC when comparing epinephrine with all pooled treatments (RR: 1.13, 95% CI: 0.84-1.53). When epinephrine was compared with a placebo/no drugs, survival to hospital discharge (RR: 1.34, 95% CI: 1.08-1.67), ROSC (RR: 2.03, 95% CI: 1.18-3.51) and survival to hospital admission (RR: 2.04, 95% CI: 1.22-3.43) were increased, but there was not a favorable neurologic outcome (RR: 1.22, 95% CI: 0.99-1.51).ConclusionsIn OHCA, standard or high doses of epinephrine should be used because they improved survival to hospital discharge and resulted in a meaningful clinical outcome. There was also a clear advantage of using epinephrine over a placebo or no drugs in the considered outcomes.Copyright © 2019 Elsevier B.V. All rights reserved.

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