Drug interactions
Buprenorphine subdermal implant + Methadone
Severity: Major
Buprenorphine subdermal implant and Methadone: major interaction.
Last updated Sources: US FDA label
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Buprenorphine can precipitate withdrawal in methadone-dependent patients through partial agonist activity, and both drugs add to sedation and QT effects. The implant provides prolonged exposure that cannot be quickly withdrawn.
What this interaction means in plain words
Buprenorphine subdermal implant and Methadone can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Partial agonist displacement at mu receptors with additive CNS depression and QT prolongation.
What to do
Avoid starting the implant in patients taking methadone unless they are first stabilized through a structured transition. Monitor for withdrawal, sedation and QTc changes.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Methadone
- Alvimopan + Methadone Contraindicated
- Calcium / magnesium / potassium / sodium oxybates + Methadone Contraindicated
- Droperidol + Methadone Contraindicated
- Ibutilide + Methadone Contraindicated
- Isocarboxazid + Methadone Contraindicated
- Lefamulin + Methadone Contraindicated
Frequently asked questions
Can I take Buprenorphine subdermal implant with Methadone?
MediHelp rates the interaction as major. Buprenorphine subdermal implant and Methadone can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Buprenorphine can precipitate withdrawal in methadone-dependent patients through partial agonist activity, and both drugs add to sedation and QT effects. The implant provides prolonged exposure that cannot be quickly withdrawn.
How serious is the interaction between Buprenorphine subdermal implant and Methadone?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid starting the implant in patients taking methadone unless they are first stabilized through a structured transition. Monitor for withdrawal, sedation and QTc changes.
What other medicines interact with Methadone?
MediHelp also lists interactions of Methadone with, for example, Alvimopan, Calcium / magnesium / potassium / sodium oxybates, Droperidol. The full list is on the Methadone page.
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