Drug interactions
Buprenorphine buccal + Morphine
Severity: Major
Buprenorphine buccal and Morphine: 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 is a high-affinity partial mu agonist that can displace morphine from the receptor. In patients physically dependent on morphine this may precipitate withdrawal, while analgesia and additive sedation may be unpredictable.
What this interaction means in plain words
Buprenorphine buccal and Morphine 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
Competitive receptor binding by a high-affinity partial agonist displaces a full agonist, with additive CNS depression.
What to do
Avoid combining unless transitioning deliberately under supervision, and time buprenorphine start according to withdrawal signs. Monitor for withdrawal, sedation and respiratory depression.
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 Morphine
- Alvimopan + Morphine Contraindicated
- Isocarboxazid + Morphine Contraindicated
- Morphine + Olanzapine / samidorphan Contraindicated
- Morphine + Phenelzine Contraindicated
- Morphine + Tranylcypromine Contraindicated
- Alfentanil + Morphine Major
Frequently asked questions
Can I take Buprenorphine buccal with Morphine?
MediHelp rates the interaction as major. Buprenorphine buccal and Morphine 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 is a high-affinity partial mu agonist that can displace morphine from the receptor. In patients physically dependent on morphine this may precipitate withdrawal, while analgesia and additive sedation may be unpredictable.
How serious is the interaction between Buprenorphine buccal and Morphine?
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 combining unless transitioning deliberately under supervision, and time buprenorphine start according to withdrawal signs. Monitor for withdrawal, sedation and respiratory depression.
What other medicines interact with Morphine?
MediHelp also lists interactions of Morphine with, for example, Alvimopan, Isocarboxazid, Olanzapine / samidorphan. The full list is on the Morphine page.
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