• Am J Emerg Med · Jun 2019

    Does co-treatment with ultra-low-dose naloxone and morphine provide better analgesia in renal colic patients?

    • Seyed Mohammad Hosseininejad, Mehdi Mohammadian Amiri, Farzad Bozorgi, Seyyed Hosein Montazar, Abolfazl Firouzian, Mahmood Moosazadeh, Iraj Goli Khatir, Niloufar Shahbakhti, and Hadi Darvishi-Khezri.
    • Department of Emergency Medicine, Gut and Liver research center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.
    • Am J Emerg Med. 2019 Jun 1; 37 (6): 1025-1032.

    ObjectiveThis study attempted to evaluate the efficacy of ultra-low-dose intravenous (IV) naloxone combined with IV morphine, as compared to IV morphine alone, in terms of reducing pain and morphine-induced side effects in patients with renal colic.MethodsIn this double-blind clinical trial, 150 patients aged 34 to 60 years old who presented to the emergency department (ED) with renal colic were randomly allocated to either an intervention group that received ultra-low-dose IV naloxone combined with IV morphine or to a control group that received morphine plus a placebo. The severity of pain, sedation, and nausea were assessed and recorded for all patients at entrance to the ED (T1), then at 20 (T2), 40 (T3), 60 (T4), 120 (T5), and 180 (T6) minutes after starting treatment. The Numeric Rating Scale (NRS) was used for the assessment of pain and nausea intensities, and the Ramsay Sedation Scale (RSS) was used to assess sedation.ResultsA GEE model revealed that patients in the naloxone group had non-significantly reduced pain scores compared to those in the morphine group (coefficient = -0.68; 95% CI: -1.24 to -0.11, Wald X2 (1) = 5.41, p = 0.02). The sedation outcome demonstrated no statistically significant differences at T1 to T4 among patients with renal colic compared to the ones who only received morphine. At T5 and T6, 1.5% vs. 20% and 1.5% vs. 16.9% of subjects from the naloxone group versus the morphine group obtained RSS scores equal to 3, respectively (p = 0.001 and p = 0.004, respectively).ConclusionsCompared to patients who only received IV morphine, co-treatment of ultra-low-dose naloxone with morphine could not provide better analgesia and sedation/agitation states in renal colic patients.Copyright © 2018. Published by Elsevier Inc.

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