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Methadone more effective than buprenorphine/naloxone for treatment retention of opioid use disorder: JAMA

Dr. Kamal Kant KohliWritten by Dr. Kamal Kant Kohli Published On 2024-10-22T21:00:56+05:30  |  Updated On 22 Oct 2024 9:01 PM IST
Methadone more effective than buprenorphine/naloxone for treatment retention of opioid use disorder: JAMA
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People with opioid use disorder in British Columbia who received methadone had a 37-40 per cent lower rate of treatment discontinuation compared with those who received buprenorphine/naloxone.

The new research, published this week in the Journal of the American Medical Association, evaluated the risk of treatment discontinuation and mortality in people prescribed opioid agonist treatment (OAT) over a 10-year period.

“Reducing the risk of treatment discontinuation saves lives. With thousands of lives lost since the introduction of fentanyl into B.C.’s unregulated drug supply, it is important that we continue to evaluate the best available treatment options,” said Dr. Bohdan Nosyk, scientist at the Centre for Advancing Health Outcomes and a professor in the Faculty of Health Sciences at Simon Fraser University. “Comparative studies like this using high-quality health administrative data are one of the best sources of evidence we have to evaluate how our treatment options are performing as the toxic drug supply continues to evolve.”

The study, Buprenorphine/naloxone versus methadone for the treatment of opioid use disorder, was a collaboration between scientists and public health professionals from the Centre for Advancing Health Outcomes, Simon Fraser University, BC Centre on Substance Use, University of British Columbia (UBC), and McGill University in Canada, and universities and institutions in the United Kingdom, Austria, and across the United States.

This study included everyone in B.C. who received either methadone or buprenorphine/naloxone for opioid use disorders from Jan 1, 2010 to Mar 17, 2020 (30,891 people) and compared the impact of these medications on retention and all-cause mortality. Fentanyl was first detected in the drug supply in 2012 and became the primary driver of overdose mortality in 2016. The study period ended the day before BC declared a public health emergency for COVID-19. Just over 61 per cent of people in the cohort were prescribed methadone.

The study found that the risk of treatment discontinuation was lower among recipients of methadone compared with buprenorphine/naloxone. The risk of mortality was low during treatment and did not differ meaningfully between the two medications (0.13% vs. 0.08%). Importantly, these findings were consistent after the introduction of fentanyl and across patient subgroups, including youth (<24 years), people with severe mental disorders, and people with concurrent chronic pain.

“The benefits of these medications are only realized while people are using them. However, retention in OAT has steadily declined over the past 13 years,” said Dr. Paxton Bach, Clinical Assistant Professor in the Department of Medicine at UBC, Co-Medical Director for the BC Centre on Substance Use, and a co-author on the study. “Continuous evaluation and refinement of clinical guidance based on the strongest available evidence is vital in order to provide the best possible support to people with opioid use disorder in BC and around the world.”

Earlier research shows that mortality risk for people on OAT more than doubles after treatment discontinuation versus while on treatment.

The researchers noted that while this evidence suggests that methadone remains the treatment option with the strong evidence of effectiveness, decisions about medication choice must be made in collaboration with patients. Developing novel therapeutic regimens, like co-prescription of hydromorphone, is also an urgent priority. Additionally, there needs to be consideration the existing barriers to treatment retention, like urine drug screening and daily witnessed doses, and incorporation of strategies to improve retention, like engagement of peer support workers.

Reference:

Nosyk B, Min JE, Homayra F, et al. Buprenorphine/Naloxone vs Methadone for the Treatment of Opioid Use Disorder. JAMA. Published online October 17, 2024. doi:10.1001/jama.2024.16954

Journal of the American Medical AssociationMethadonebuprenorphinenaloxoneopioid use disorder
Source : Journal of the American Medical Association
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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