Extended-release injectable naltrexone for opioid use disorder

We appreciate the important review by Gluck et al (“Managing patients with comorbid opioid and alcohol use disorders,” Current Psychiatry, February 2023, p. 20-28, doi:10.12788/cp.0327) addressing the common co-occurrence of opioid use disorder (OUD) and alcohol use disorder (AUD) among hospitalized patients, and we offer a friendly amendment to the algorithm they presented. Early in their algorithm, the authors suggest asking patients whether they want pharmacologic treatment for OUD. We recommend that if the patient affirms interest in OUD medication, the next question should be whether the patient prefers to be opioid-free. If the patient says “yes,” extended-release injectable naltrexone (XR-NTX) is offered. If the patient answers “no,” they can be offered buprenorphine or methadone.

XR-NTX should be considered an equal OUD treatment alternative to buprenorphine-naloxone, especially for patients who prefer an opioid-free option.^1,2 It has the added advantage of being FDA-approved for both AUD and OUD.

One obstacle to the success of XR-NTX is the induction period. The National Institute on Drug Abuse Clinical Trials Network X:BOT trial found that once the induction hurdle was surmounted, XR-NTX and buprenorphine were equally effective in a population of approximately 80% heroin users and two-thirds injection drug users.² Patient variables that predict successful induction include young age, baseline preference for XR-NTX, fewer drug complications, and fewer family/social complications.³ If the length of the induction (usually 7 to 10 days) is a deterrent, a study supported the feasibility of a 5-day outpatient XR-NTX induction.⁴ Further research is needed to improve successful induction for XR-NTX.

Ashmeer Ogbuchi, MD
Karen Drexler, MD
Atlanta, Georgia

References

1. Tanum L, Solli KK, Latif Z, et al. Effectiveness of injectable extended-release naltrexone vs daily buprenorphine-naloxone for opioid dependence. JAMA Psychiatry. 2017;74(12):1197-1205. doi:10.1001/ jamapsychiatry.2017.3206

2. Lee JD, Nunes EV Jr, Novo P, et al. Comparative effectiveness of extended-release naltrexone versus buprenorphine-naloxone for opioid relapse prevention (X:BOT): a multicentre, open-label, randomised controlled trial. Lancet. 2018;391(10118):309-318. doi:10.1016/s0140-6736(17)32812-x

3. Murphy SM, Jeng PJ, McCollister KE, et al. Cost‐effectiveness implications of increasing the efficiency of the extended‐release naltrexone induction process for the treatment of opioid use disorder: a secondary analysis. Addiction. 2021;116(12)3444-3453. doi:10.1111/add.15531

4. Sibai M, Mishlen K, Nunes EV, et al. A week-long outpatient induction onto XR-naltrexone in patients with opioid use disorder. Am J Drug Alcohol Abuse. 2020;46(3):289-296. doi:10.1080/00952990.2019.1700265

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