Naltrexone vs Buprenorphine-Naloxone for Opioid Dependence in Norway
Summary
Persons dependent on opioids like heroin, morphine, or codeine have a high risk of relapse, overdose and overdose death. This risk is elevated even further following discharge from treatment or correctional institutions where patients have been detoxified. At the moment, state-of-the-art treatment is based on maintaining the dependence on opioids by daily intake of opioid medications like methadone or buprenorphine. Recently, a medication containing the blocking agent naltrexone was approved in the US; this does not maintain dependence but instead blocks heroin and other opioids for 28 days after intramuscular administration. This study will conduct a 12-week randomized comparison of naltrexone intramuscular suspension (XL-NTX) with daily buprenorphine-naloxone in OMT. Medication will start preceding discharge from a treatment or correctional facility to participating catchment regions in Norway. The main hypotheses are that XL-NTX will do equally well as - or better than - OMT on the proportion of biological samples negative for opioids, retention, self-reported use of alcohol and illicit drugs. Following the 12-week randomized period, there will be a 36-week period where participants can receive the study medication of their choice. After the end of the study, data from national registry databases can be collected for a further 12 months on outcomes such as recidivism, mortality and morbidity.
Timeline
- Start
- 2012-10
- Primary completion
- 2016-08-31
- Completion
- 2018-04-30
Publications
- Kornor H, Lobmaier PPK, Kunoe N. Sustained-release naltrexone for opioid dependence. Cochrane Database Syst Rev. 2025 May 9;5(5):CD006140. doi: 10.1002/14651858.CD006140.pub3.
- Solli KK, Benth JS, Digranes LCW, Holtan L, Kunoe N, Tanum L. Changes in mental health during long-term treatment with extended-release naltrexone: A 3-year clinical study of opioid dependent individuals. Contemp Clin Trials. 2025 May;152:107861. doi: 10.1016/j.cct.2025.107861. Epub 2025 Feb 21.
- Opheim A, Benth JS, Solli KK, Kloster PS, Fadnes LT, Kunoe N, Gaulen Z, Tanum L. Risk of relapse to non-opioid addictive substances among opioid dependent patients treated with an opioid receptor antagonist or a partial agonist: A randomized clinical trial. Contemp Clin Trials. 2023 Dec;135:107360. doi: 10.1016/j.cct.2023.107360. Epub 2023 Oct 19.
- Opheim A, Gaulen Z, Solli KK, Latif ZE, Fadnes LT, Benth JS, Kunoe N, Tanum L. Risk of Relapse Among Opioid-Dependent Patients Treated With Extended-Release Naltrexone or Buprenorphine-Naloxone: A Randomized Clinical Trial. Am J Addict. 2021 Sep;30(5):453-460. doi: 10.1111/ajad.13151.
- Latif ZE, Solli KK, Opheim A, Kunoe N, Benth JS, Krajci P, Sharma-Haase K, Tanum L. No increased pain among opioid-dependent individuals treated with extended-release naltrexone or buprenorphine-naloxone: A 3-month randomized study and 9-month open-treatment follow-up study. Am J Addict. 2019 Feb;28(2):77-85. doi: 10.1111/ajad.12859. Epub 2019 Jan 31.
- Latif ZE, Saltyte Benth J, Solli KK, Opheim A, Kunoe N, Krajci P, Sharma-Haase K, Tanum L. Anxiety, Depression, and Insomnia Among Adults With Opioid Dependence Treated With Extended-Release Naltrexone vs Buprenorphine-Naloxone: A Randomized Clinical Trial and Follow-up Study. JAMA Psychiatry. 2019 Feb 1;76(2):127-134. doi: 10.1001/jamapsychiatry.2018.3537.
- Solli KK, Latif ZE, Opheim A, Krajci P, Sharma-Haase K, Benth JS, Tanum L, Kunoe N. Effectiveness, safety and feasibility of extended-release naltrexone for opioid dependence: a 9-month follow-up to a 3-month randomized trial. Addiction. 2018 Oct;113(10):1840-1849. doi: 10.1111/add.14278. Epub 2018 Jun 22.
- Tanum L, Solli KK, Latif ZE, Benth JS, Opheim A, Sharma-Haase K, Krajci P, Kunoe N. Effectiveness of Injectable Extended-Release Naltrexone vs Daily Buprenorphine-Naloxone for Opioid Dependence: A Randomized Clinical Noninferiority Trial. JAMA Psychiatry. 2017 Dec 1;74(12):1197-1205. doi: 10.1001/jamapsychiatry.2017.3206.
- Kunoe N, Opheim A, Solli KK, Gaulen Z, Sharma-Haase K, Latif ZE, Tanum L. Design of a randomized controlled trial of extended-release naltrexone versus daily buprenorphine-naloxone for opioid dependence in Norway (NTX-SBX). BMC Pharmacol Toxicol. 2016 Apr 28;17(1):18. doi: 10.1186/s40360-016-0061-1.
Drugs
| Evaluation | Drug | Modality | Dose | Route |
|---|---|---|---|---|
| Comparator | Buprenorphine | Other / unclassified | 16 mg | Oral |
| Comparator | Naloxone | Small molecule | — | Oral |
| Subject | Naltrexone | Small molecule | 380 mg | Intramuscular |