{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,27]],"date-time":"2026-04-27T15:16:25Z","timestamp":1777302985472,"version":"3.51.4"},"reference-count":21,"publisher":"The Korean Society of Anesthesiologists","issue":"3","license":[{"start":{"date-parts":[[2024,7,31]],"date-time":"2024-07-31T00:00:00Z","timestamp":1722384000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["anesth-pain-med.org"],"crossmark-restriction":true},"short-container-title":["Anesth Pain Med"],"published-print":{"date-parts":[[2024,7,31]]},"abstract":"<jats:p>Background: Postoperative pain can lead to several complications. The effectiveness of different opioids in relieving pain after surgery has been widely studied. However, managing pain in patients with opioid addiction is still challenging. This study aimed to examine the impact of ketamine and methadone on postoperative pain in patients with addiction.Methods: This was a non-inferiority randomized clinical trial. All included patients were monitored for morphine use, pain scores, and vital signs every 3 h. The intervention group received 0.5 mg\/kg ketamine administered intravenously every 6 h. The control group received 5 mg of methadone intramuscularly every 8 h. The patient received intravenous morphine if their visual analog scale was above 3. All side effects in each group were recorded.Results: Two hundred and twenty patients were included in this study. There were 127 men (57.7%) with an average age of 57.1 \u00b1 19.5 and 93 women (42.3%) with an average age of 57.1 \u00b1 21.0. There were no significant differences in demographic characteristics between the groups. There was no significant difference in the dose or frequency of morphine administration between groups. There was no significant difference between the groups in pain scores and vital signs at different time points. Drug side effects, including delirium and gastrointestinal symptoms, did not differ significantly between the methadone and ketamine groups. Conclusions: Our clinical data support the hypothesis that ketamine is not inferior to methadone in patients with addiction. Future randomize clinical trials are needed to confirm these observations.<\/jats:p>","DOI":"10.17085\/apm.23129","type":"journal-article","created":{"date-parts":[[2024,7,31]],"date-time":"2024-07-31T00:14:00Z","timestamp":1722384840000},"page":"209-215","update-policy":"https:\/\/doi.org\/10.17085\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Comparison of low-dose ketamine to methadone for postoperative pain in opioid addicts: a randomized clinical trial"],"prefix":"10.17085","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1582-3961","authenticated-orcid":true,"given":"Elham","family":"Bakhtiari","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9880-2532","authenticated-orcid":true,"given":"Mehrdad 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reinvigoration?","author":"Kharasch","year":"2011"},{"key":"ref13","doi-asserted-by":"publisher","DOI":"10.1213\/ane.0b013e3181d8a095"},{"key":"ref14","first-page":"822","volume-title":"Clinical effectiveness and safety of intraoperative methadone in patients undergoing posterior spinal fusion surgery: a randomized, double-blinded, controlled trial","author":"Murphy","year":"2017"},{"key":"ref15","first-page":"1209","volume-title":"Effects of ketamine on sensory perception: evidence for a role of N-methyl-D-aspartate receptors","author":"Oye","year":"1992"},{"key":"ref16","doi-asserted-by":"publisher","DOI":"10.1176\/appi.ajp.2018.18020138"},{"key":"ref17","doi-asserted-by":"publisher","DOI":"10.1021\/acschemneuro.9b00288"},{"key":"ref18","doi-asserted-by":"publisher","DOI":"10.1097\/j.pain.0000000000000782"},{"key":"ref19","first-page":"E299","volume-title":"Perioperative ketamine for analgesia in spine surgery: a meta-analysis of randomized controlled 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