Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
PHASE4
40 participants
INTERVENTIONAL
2025-02-19
2026-08-31
Brief Summary
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The main questions are:
1. Are investigators able to recruit participants for this trial and learn from this study to plan a larger trial?
2. Does Methadone administered rectally during surgery, reduce participants' pain intensity, use less pain medication, and have a better recovery after surgery? Investigators will compare Methadone to a placebo (a look-alike substance that contains no drug) to see if Methadone works to manage pain after surgery better than the usual pain management.
Participants will:
* receive either Methadone or placebo during surgery.
* be asked some questions about their pain during days 1 to 3 after surgery
* be contacted by phone to ask about their recovery
At this time, the study aims to recruit 40 participants from St. Michael's Hospital, to learn whether it will be feasible to plan a larger study.
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Detailed Description
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* Interventional trial
* Allocation: Randomized
* Intervention model: 2-Arm Parallel-Group
* Primary purpose: Feasibility
* Phase: Phase IV
Masking Participants and Outcome Assessors
Study Intervention:
* Intervention Arm: Methadone 0.2mg/kg of ideal body weight via rectal administration + standard or care
* Placebo Arm: Saline solution via rectal administration + standard of care
Follow-Up: Postoperative days 1, 2, 3, and 30
Conditions
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Study Design
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RANDOMIZED
PARALLEL
SUPPORTIVE_CARE
TRIPLE
Study Groups
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Intervention Arm with Methadone
During the spinal surgery intervention, participants receive a single dose of 0.2mg/kg of Methadone rectally, after anesthesia induction.
Rectal Methadone administer during spinal surgery
Rectal Methadone administered during spinal surgery for post-operative pain management
Placebo arm
During the spinal surgery intervention, participants receive a single dose of saline solution rectally after anesthesia induction.
Placebo: Rectal saline solution
Placebo: Rectal saline solution single dose received during surgery
Interventions
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Rectal Methadone administer during spinal surgery
Rectal Methadone administered during spinal surgery for post-operative pain management
Placebo: Rectal saline solution
Placebo: Rectal saline solution single dose received during surgery
Eligibility Criteria
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Inclusion Criteria
2. Elective spinal surgery with fusion of one or more sacral, lumbar, thoracic, and/or cervical levels
3. Capacity to provide informed consent
4. For participants of childbearing potential, use of contraception.
Exclusion Criteria
2. Hypersensitivity to the active substance (methadone hydrochloride) or other opioid analgesics or to any ingredient in the formulation
3. Pregnant or nursing participants
4. Known or suspected mechanical gastrointestinal obstruction
5. Acute respiratory depression, elevated carbon dioxide levels in the blood, cor pulmonale, or pulmonary disease necessitating home oxygen therapy
6. Acute alcohol intoxication, delirium tremens, and convulsive disorders secondary to alcohol intoxication
7. Severe central nervous system depression, increased intracranial pressure, or head injury
8. Use of monoamine oxidase (MAO) inhibitors, such as isocarboxazid, phenelzine, selegiline, and tranylcypromine, within 14 days of enrollment
9. Diarrhea associated with pseudomembranous colitis caused by cephalosporins, lincomycins, or penicillins
10. Preoperative renal insufficiency or failure
11. Significant liver disease (cirrhosis or hepatic failure)
12. History of opioid use disorder within the last 3 months
13. Patients taking more than 90 mg of morphine equivalents daily
14. Poor comprehension of the English language
15. Patients who are likely to remain intubated postoperatively
16. QT interval \> 500ms on preoperative ECG
18 Years
65 Years
ALL
No
Sponsors
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AFP Innovation Fund
OTHER
Unity Health Toronto
OTHER
Responsible Party
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Principal Investigators
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Sergio Pereira, MD PhD
Role: PRINCIPAL_INVESTIGATOR
St. Michael's Hospital. Unity Health Toronto
Locations
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St. Michael's Hospital
Toronto, Ontario, Canada
Countries
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Central Contacts
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Facility Contacts
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References
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Dale O, Sheffels P, Kharasch ED. Bioavailabilities of rectal and oral methadone in healthy subjects. Br J Clin Pharmacol. 2004 Aug;58(2):156-62. doi: 10.1111/j.1365-2125.2004.02116.x.
Murphy GS, Szokol JW, Avram MJ, Greenberg SB, Shear TD, Deshur MA, Vender JS, Benson J, Newmark RL. Clinical Effectiveness and Safety of Intraoperative Methadone in Patients Undergoing Posterior Spinal Fusion Surgery: A Randomized, Double-blinded, Controlled Trial. Anesthesiology. 2017 May;126(5):822-833. doi: 10.1097/ALN.0000000000001609.
Machado FC, Vieira JE, de Orange FA, Ashmawi HA. Intraoperative Methadone Reduces Pain and Opioid Consumption in Acute Postoperative Pain: A Systematic Review and Meta-analysis. Anesth Analg. 2019 Dec;129(6):1723-1732. doi: 10.1213/ANE.0000000000004404.
Murphy GS, Avram MJ, Greenberg SB, Shear TD, Deshur MA, Dickerson D, Bilimoria S, Benson J, Maher CE, Trenk GJ, Teister KJ, Szokol JW. Postoperative Pain and Analgesic Requirements in the First Year after Intraoperative Methadone for Complex Spine and Cardiac Surgery. Anesthesiology. 2020 Feb;132(2):330-342. doi: 10.1097/ALN.0000000000003025.
Machado FC, Palmeira CCA, Torres JNL, Vieira JE, Ashmawi HA. Intraoperative use of methadone improves control of postoperative pain in morbidly obese patients: a randomized controlled study. J Pain Res. 2018 Oct 2;11:2123-2129. doi: 10.2147/JPR.S172235. eCollection 2018.
Gottschalk A, Durieux ME, Nemergut EC. Intraoperative methadone improves postoperative pain control in patients undergoing complex spine surgery. Anesth Analg. 2011 Jan;112(1):218-23. doi: 10.1213/ANE.0b013e3181d8a095. Epub 2010 Apr 24.
Elliott K, Kest B, Man A, Kao B, Inturrisi CE. N-methyl-D-aspartate (NMDA) receptors, mu and kappa opioid tolerance, and perspectives on new analgesic drug development. Neuropsychopharmacology. 1995 Dec;13(4):347-56. doi: 10.1016/0893-133X(95)00083-P.
Benyamin R, Trescot AM, Datta S, Buenaventura R, Adlaka R, Sehgal N, Glaser SE, Vallejo R. Opioid complications and side effects. Pain Physician. 2008 Mar;11(2 Suppl):S105-20.
American Society of Anesthesiologists Task Force on Acute Pain Management. Practice guidelines for acute pain management in the perioperative setting: an updated report by the American Society of Anesthesiologists Task Force on Acute Pain Management. Anesthesiology. 2012 Feb;116(2):248-73. doi: 10.1097/ALN.0b013e31823c1030. No abstract available.
Weir S, Samnaliev M, Kuo TC, Ni Choitir C, Tierney TS, Cumming D, Bruce J, Manca A, Taylor RS, Eldabe S. The incidence and healthcare costs of persistent postoperative pain following lumbar spine surgery in the UK: a cohort study using the Clinical Practice Research Datalink (CPRD) and Hospital Episode Statistics (HES). BMJ Open. 2017 Sep 11;7(9):e017585. doi: 10.1136/bmjopen-2017-017585.
Gerbershagen HJ, Aduckathil S, van Wijck AJ, Peelen LM, Kalkman CJ, Meissner W. Pain intensity on the first day after surgery: a prospective cohort study comparing 179 surgical procedures. Anesthesiology. 2013 Apr;118(4):934-44. doi: 10.1097/ALN.0b013e31828866b3.
Gan TJ. Poorly controlled postoperative pain: prevalence, consequences, and prevention. J Pain Res. 2017 Sep 25;10:2287-2298. doi: 10.2147/JPR.S144066. eCollection 2017.
Puvanesarajah V, Liauw JA, Lo SF, Lina IA, Witham TF, Gottschalk A. Analgesic therapy for major spine surgery. Neurosurg Rev. 2015 Jul;38(3):407-18; discussion 419. doi: 10.1007/s10143-015-0605-7. Epub 2015 Feb 14.
Other Identifiers
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P-004
Identifier Type: -
Identifier Source: org_study_id
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