• Xu Zhili, Chen Linglong, Jin Shuang, and Yang Baohua.
• Department of Emergency, Wenzhou People Hospital, Wenzhou, P.R. China, Zhejiang, 325000, China.
• Am J Emerg Med. 2020 Jul 1; 38 (7): 1470-1474.

IntroductionThe choice of intravenous paracetamol or morphine for the pain control of renal colic remains controversial. We conduct a systematic review and meta-analysis to compare the analgesic efficacy and safety of intravenous paracetamol with morphine for renal colic pain.MethodsWe search PubMed, EMbase, Web of science, EBSCO, and Cochrane library databases through September 2019 for randomized controlled trials (RCTs) assessing the analgesic efficacy and safety of intravenous paracetamol versus morphine for renal colic pain. This meta-analysis is performed using the random-effect model.ResultsFive RCTs are included in the meta-analysis. Intravenous paracetamol can lead to significantly lower pain scores at 30 min (standard mean difference (Std. MD) = -0.40; 95% confidence interval (CI) = -0.68 to -0.12; P = 0.005) and incidence of dizziness (risk ratio (RR) = 0.06; 95% CI = 0.01 to 0.48; P = 0.007) than morphine for renal colic pain. There is no statistical difference of pain scores at 15 min (Std. MD = -0.80; 95% CI = -1.84 to 0.24; P = 0.13), analgesic rescue (RR = 0.73; 95% CI = 0.45 to 1.19; P = 0.21), the incidence of adverse events (RR = 0.60; 95% CI = 0.35 to 1.03; P = 0.06), nausea or vomiting (RR = 0.61; 95% CI = 0.20 to 1.87; P = 0.38) between two groups.ConclusionsIntravenous paracetamol may result in lower pain scores at 30 min than morphine for renal colic pain, and more studies should be conducted to compare their analgesic efficacy.Copyright © 2020. Published by Elsevier Inc.

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