Drug interactions
Marijuana + Vinblastine
Severity: Minor
Marijuana and Vinblastine: 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 can inhibit CYP3A4 in vitro, so a rise in vinblastine exposure is theoretically possible. Clinical evidence is lacking and the effect is likely small.
What this interaction means in plain words
Marijuana and Vinblastine 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 such as CBD and THC may weakly inhibit CYP3A4.
What to do
Monitor for vinblastine toxicity such as neuropathy, constipation and myelosuppression. No dose adjustment is routinely needed.
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 Vinblastine
Frequently asked questions
Can I take Marijuana with Vinblastine?
MediHelp rates the interaction as minor. Marijuana and Vinblastine 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 can inhibit CYP3A4 in vitro, so a rise in vinblastine exposure is theoretically possible. Clinical evidence is lacking and the effect is likely small.
How serious is the interaction between Marijuana and Vinblastine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for vinblastine toxicity such as neuropathy, constipation and myelosuppression. No dose adjustment is routinely needed.
What other medicines interact with Vinblastine?
MediHelp also lists interactions of Vinblastine with, for example, Adenovirus types 4 and 7 live, Apalutamide, Atazanavir. The full list is on the Vinblastine page.
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