Drug interactions
Buprenorphine subdermal implant + Doxylamine
Severity: Major
Buprenorphine subdermal implant 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
Buprenorphine with other CNS depressants such as sedating antihistamines raises the risk of profound sedation and respiratory depression. Doxylamine can add to these effects even at steady implant exposure.
What this interaction means in plain words
Buprenorphine subdermal implant 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 regular doxylamine use; if unavoidable use the lowest dose and monitor for sedation and slowed breathing. Advise patients to avoid alcohol and other sedatives.
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 subdermal implant with Doxylamine?
MediHelp rates the interaction as major. Buprenorphine subdermal implant 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. Buprenorphine with other CNS depressants such as sedating antihistamines raises the risk of profound sedation and respiratory depression. Doxylamine can add to these effects even at steady implant exposure.
How serious is the interaction between Buprenorphine subdermal implant 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 regular doxylamine use; if unavoidable use the lowest dose and monitor for sedation and slowed breathing. Advise patients to avoid alcohol and other sedatives.
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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