Drug interactions
Erythromycin + Marijuana
Severity: Minor
Erythromycin and Marijuana: minor 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 constituents are metabolized by CYP3A4 and CYP2C9, and erythromycin may modestly raise cannabinoid exposure. The effect is likely mild, with possible increased sedation or tachycardia. A contraindication is not justified.
What this interaction means in plain words
Erythromycin and Marijuana have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Erythromycin inhibits CYP3A4, which may modestly decrease cannabinoid clearance; the evidence is largely theoretical.
What to do
No routine action is needed; counsel the patient about increased drowsiness or palpitations and reduce cannabis use if these occur.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Erythromycin and Marijuana, 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 7 days on the web. No card needed.
Other interactions of Erythromycin
- Conivaptan + Erythromycin Contraindicated
- Dihydroergotamine intranasal + Erythromycin Contraindicated
- Dihydroergotamine + Erythromycin Contraindicated
- Domperidone + Erythromycin Contraindicated
- Dronedarone + Erythromycin Contraindicated
- Droperidol + Erythromycin Contraindicated
Frequently asked questions
Can I take Erythromycin with Marijuana?
MediHelp rates the interaction as minor. Erythromycin and Marijuana have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Cannabis constituents are metabolized by CYP3A4 and CYP2C9, and erythromycin may modestly raise cannabinoid exposure. The effect is likely mild, with possible increased sedation or tachycardia. A contraindication is not justified.
How serious is the interaction between Erythromycin and Marijuana?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine action is needed; counsel the patient about increased drowsiness or palpitations and reduce cannabis use if these occur.
What other medicines interact with Erythromycin?
MediHelp also lists interactions of Erythromycin with, for example, Conivaptan, Dihydroergotamine intranasal, Dihydroergotamine. The full list is on the Erythromycin 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.
