Drug interactions
Buprenorphine buccal + Doxylamine
Severity: Major
Buprenorphine buccal and Doxylamine: 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
Opioids combined with other CNS depressants carry a risk of profound sedation, respiratory depression, coma and death. Doxylamine adds sedating antihistamine effects to buprenorphine.
What this interaction means in plain words
Buprenorphine buccal and Doxylamine 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 via opioid receptor agonism and central H1 antagonism.
What to do
Avoid concurrent use where possible; if necessary use the lowest doses for the shortest time and monitor sedation and respiratory status. Counsel patients and caregivers on warning signs of overdose.
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 Doxylamine
Frequently asked questions
Can I take Buprenorphine buccal with Doxylamine?
MediHelp rates the interaction as major. Buprenorphine buccal and Doxylamine 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. Opioids combined with other CNS depressants carry a risk of profound sedation, respiratory depression, coma and death. Doxylamine adds sedating antihistamine effects to buprenorphine.
How serious is the interaction between Buprenorphine buccal and Doxylamine?
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 concurrent use where possible; if necessary use the lowest doses for the shortest time and monitor sedation and respiratory status. Counsel patients and caregivers on warning signs of overdose.
What other medicines interact with Doxylamine?
MediHelp also lists interactions of Doxylamine with, for example, Belladonna and opium, Benzhydrocodone / acetaminophen, Brexanolone. The full list is on the Doxylamine page.
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