Drug interactions
Buprenorphine subdermal implant + Methocarbamol
Severity: Major
Buprenorphine subdermal implant and Methocarbamol: major interaction.
Last updated Sources: UK SmPC
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
Methocarbamol is a centrally acting muscle relaxant that causes drowsiness and dizziness. Together with buprenorphine, it can produce additive sedation, slowed breathing and impaired psychomotor performance.
What this interaction means in plain words
Buprenorphine subdermal implant and Methocarbamol 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
Additive central nervous system depression through pharmacodynamic synergism between an opioid and a sedating muscle relaxant.
What to do
Use together only if alternatives are inadequate, with the lowest effective doses and shortest duration. Monitor for excessive sedation and respiratory depression and counsel the patient against driving.
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 Methocarbamol
Frequently asked questions
Can I take Buprenorphine subdermal implant with Methocarbamol?
MediHelp rates the interaction as major. Buprenorphine subdermal implant and Methocarbamol 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. Methocarbamol is a centrally acting muscle relaxant that causes drowsiness and dizziness. Together with buprenorphine, it can produce additive sedation, slowed breathing and impaired psychomotor performance.
How serious is the interaction between Buprenorphine subdermal implant and Methocarbamol?
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 together only if alternatives are inadequate, with the lowest effective doses and shortest duration. Monitor for excessive sedation and respiratory depression and counsel the patient against driving.
What other medicines interact with Methocarbamol?
MediHelp also lists interactions of Methocarbamol with, for example, Alfentanil, Amobarbital, Belladonna and opium. The full list is on the Methocarbamol page.
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