Drug interactions
Methadone + Nalbuphine
Severity: Major
Methadone and Nalbuphine: 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
Nalbuphine is a mixed agonist-antagonist that can displace methadone at the mu receptor in opioid-dependent patients and precipitate withdrawal. Reduced analgesia may also occur, and sedation can be additive in non-dependent patients.
What this interaction means in plain words
Methadone and Nalbuphine 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.
Methadone belongs to Musculoskeletal; Nalbuphine belongs to Musculoskeletal.
Why it happens
Partial antagonism at the mu-opioid receptor competes with methadone, while additive opioid CNS depression occurs.
What to do
Avoid in patients maintained on methadone. If unavoidable, monitor for withdrawal and inadequate analgesia and observe for sedation.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Methadone and Nalbuphine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
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
Other interactions of Nalbuphine
- Alvimopan + Nalbuphine Contraindicated
- Nalbuphine + Olanzapine / samidorphan Contraindicated
- Alprazolam + Nalbuphine Major
- Amobarbital + Nalbuphine Major
- Benzhydrocodone / acetaminophen + Nalbuphine Major
- Brexanolone + Nalbuphine Major
Frequently asked questions
Can I take Methadone with Nalbuphine?
MediHelp rates the interaction as major. Methadone and Nalbuphine 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. Nalbuphine is a mixed agonist-antagonist that can displace methadone at the mu receptor in opioid-dependent patients and precipitate withdrawal. Reduced analgesia may also occur, and sedation can be additive in non-dependent patients.
How serious is the interaction between Methadone and Nalbuphine?
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 in patients maintained on methadone. If unavoidable, monitor for withdrawal and inadequate analgesia and observe for sedation.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
