Drug interactions
Buprenorphine subdermal implant + Chlorpheniramine
Severity: Major
Buprenorphine subdermal implant and Chlorpheniramine: 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
Chlorpheniramine adds sedating effects to buprenorphine, which raises the risk of drowsiness and respiratory depression. The implant gives sustained exposure that cannot be quickly withdrawn.
What this interaction means in plain words
Buprenorphine subdermal implant and Chlorpheniramine 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 depression from an opioid and a sedating antihistamine.
What to do
Prefer a non-sedating antihistamine. If combined, limit chlorpheniramine dose and duration and monitor for sedation and breathing problems.
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 Chlorpheniramine
- Belladonna and opium + Chlorpheniramine Major
- Benzhydrocodone / acetaminophen + Chlorpheniramine Major
- Brexanolone + Chlorpheniramine Major
- Buprenorphine long-acting + Chlorpheniramine Major
- Buprenorphine transdermal + Chlorpheniramine Major
- Calcium / magnesium / potassium / sodium oxybates + Chlorpheniramine Major
Frequently asked questions
Can I take Buprenorphine subdermal implant with Chlorpheniramine?
MediHelp rates the interaction as major. Buprenorphine subdermal implant and Chlorpheniramine 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. Chlorpheniramine adds sedating effects to buprenorphine, which raises the risk of drowsiness and respiratory depression. The implant gives sustained exposure that cannot be quickly withdrawn.
How serious is the interaction between Buprenorphine subdermal implant and Chlorpheniramine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer a non-sedating antihistamine. If combined, limit chlorpheniramine dose and duration and monitor for sedation and breathing problems.
What other medicines interact with Chlorpheniramine?
MediHelp also lists interactions of Chlorpheniramine with, for example, Belladonna and opium, Benzhydrocodone / acetaminophen, Brexanolone. The full list is on the Chlorpheniramine page.
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