Drug interactions
Marijuana + Orphenadrin
Severity: Moderate
Marijuana and Orphenadrin: moderate 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
Cannabis produces sedation, impaired coordination and tachycardia, and orphenadrine adds sedative and anticholinergic effects. Together they may worsen drowsiness, confusion and tachycardia.
What this interaction means in plain words
Marijuana and Orphenadrin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive central nervous system depression and anticholinergic effects.
What to do
Advise the patient to avoid cannabis use while on orphenadrine, particularly before driving, and monitor for excess sedation and heart rate increases.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Marijuana 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 Marijuana with Orphenadrin?
MediHelp rates the interaction as moderate. Marijuana and Orphenadrin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Cannabis produces sedation, impaired coordination and tachycardia, and orphenadrine adds sedative and anticholinergic effects. Together they may worsen drowsiness, confusion and tachycardia.
How serious is the interaction between Marijuana and Orphenadrin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise the patient to avoid cannabis use while on orphenadrine, particularly before driving, and monitor for excess sedation and heart rate increases.
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.
