Drug interactions
Buprenorphine long-acting + Orphenadrin
Severity: Major
Buprenorphine long-acting and Orphenadrin: 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
Orphenadrine is sedating and anticholinergic, and long-acting injectable buprenorphine provides sustained opioid exposure. The combination may cause additive sedation and respiratory depression that persists because buprenorphine cannot be quickly withdrawn.
What this interaction means in plain words
Buprenorphine long-acting and Orphenadrin 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.
What to do
Use only if alternatives are inadequate and keep the orphenadrine dose and duration to a minimum. Monitor for sedation and slowed breathing.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Buprenorphine long-acting and Orphenadrin, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Orphenadrin
Frequently asked questions
Can I take Buprenorphine long-acting with Orphenadrin?
MediHelp rates the interaction as major. Buprenorphine long-acting and Orphenadrin 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. Orphenadrine is sedating and anticholinergic, and long-acting injectable buprenorphine provides sustained opioid exposure. The combination may cause additive sedation and respiratory depression that persists because buprenorphine cannot be quickly withdrawn.
How serious is the interaction between Buprenorphine long-acting and Orphenadrin?
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 if alternatives are inadequate and keep the orphenadrine dose and duration to a minimum. Monitor for sedation and slowed breathing.
What other medicines interact with Orphenadrin?
MediHelp also lists interactions of Orphenadrin with, for example, Alfentanil, Amobarbital, Benzhydrocodone / acetaminophen. The full list is on the Orphenadrin page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
