Drug interactions
Marijuana + Paclitaxel
Severity: Minor
Marijuana and Paclitaxel: 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
Cannabinoids such as cannabidiol and THC can inhibit CYP3A4 and CYP2C8 in vitro, which could raise paclitaxel exposure. Clinical data are scarce and the effect is uncertain.
What this interaction means in plain words
Marijuana and Paclitaxel 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
Cannabinoids may inhibit CYP3A4 and CYP2C8 and reduce paclitaxel clearance.
What to do
Ask patients about cannabis use and monitor for increased paclitaxel toxicity such as neuropathy and myelosuppression.
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?
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Other interactions of Paclitaxel
Frequently asked questions
Can I take Marijuana with Paclitaxel?
MediHelp rates the interaction as minor. Marijuana and Paclitaxel have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Cannabinoids such as cannabidiol and THC can inhibit CYP3A4 and CYP2C8 in vitro, which could raise paclitaxel exposure. Clinical data are scarce and the effect is uncertain.
How serious is the interaction between Marijuana and Paclitaxel?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Ask patients about cannabis use and monitor for increased paclitaxel toxicity such as neuropathy and myelosuppression.
What other medicines interact with Paclitaxel?
MediHelp also lists interactions of Paclitaxel with, for example, Adenovirus types 4 and 7 live, Cobicistat, Cyclosporine. The full list is on the Paclitaxel page.
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