Drug interactions
Baclofen + Buprenorphine long-acting
Severity: Major
Baclofen and Buprenorphine long-acting: 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
Baclofen with long-acting injectable buprenorphine can cause additive sedation and respiratory depression. The depot gives prolonged exposure, so the interaction cannot be quickly reversed by stopping the opioid.
What this interaction means in plain words
Baclofen and Buprenorphine long-acting 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 CNS and respiratory depression from opioid receptor partial agonism and GABA-B agonism.
What to do
Use only when other treatments are inadequate, titrating baclofen to the lowest effective dose. Monitor for sedation and respiratory depression, particularly after baclofen initiation or increases.
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 Baclofen
Frequently asked questions
Can I take Baclofen with Buprenorphine long-acting?
MediHelp rates the interaction as major. Baclofen and Buprenorphine long-acting 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. Baclofen with long-acting injectable buprenorphine can cause additive sedation and respiratory depression. The depot gives prolonged exposure, so the interaction cannot be quickly reversed by stopping the opioid.
How serious is the interaction between Baclofen and Buprenorphine long-acting?
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 only when other treatments are inadequate, titrating baclofen to the lowest effective dose. Monitor for sedation and respiratory depression, particularly after baclofen initiation or increases.
What other medicines interact with Baclofen?
MediHelp also lists interactions of Baclofen with, for example, Alfentanil, Amobarbital, Belladonna and opium. The full list is on the Baclofen page.
Full monographs, dosing and an interaction checker in the MediHelp app
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