Drug interactions
Gabapentin + Methadone
Severity: Major
Gabapentin and Methadone: major interaction.
Last updated
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
Gabapentin adds to the sedative and respiratory depressant effects of methadone. Combined use has been linked to serious breathing problems and overdose deaths, especially in older adults and in patients with lung disease or renal impairment.
What this interaction means in plain words
Gabapentin 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.
Gabapentin belongs to Central Nervous System; Methadone belongs to Musculoskeletal.
Why it happens
Additive CNS and respiratory depression; gabapentin may also increase opioid-related respiratory depression.
What to do
Use the lowest effective doses of each drug and titrate slowly. Monitor for sedation and respiratory depression, and reduce the gabapentin dose in renal impairment.
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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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 Gabapentin
Frequently asked questions
Can I take Gabapentin with Methadone?
MediHelp rates the interaction as major. Gabapentin 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. Gabapentin adds to the sedative and respiratory depressant effects of methadone. Combined use has been linked to serious breathing problems and overdose deaths, especially in older adults and in patients with lung disease or renal impairment.
How serious is the interaction between Gabapentin 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: Use the lowest effective doses of each drug and titrate slowly. Monitor for sedation and respiratory depression, and reduce the gabapentin dose in renal impairment.
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
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