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Drug interactions

Bortezomib + Mitotane

Severity: Major

Bortezomib and Mitotane: 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

Mitotane is a strong CYP3A4 inducer and may substantially lower bortezomib exposure, risking reduced efficacy. The inducing effect can persist for weeks after mitotane is stopped.

What this interaction means in plain words

Bortezomib and Mitotane 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.

Bortezomib belongs to Oncology; Mitotane belongs to Oncology.

Evidence level: Moderate

Why it happens

Mitotane induces CYP3A4, accelerating bortezomib metabolism.

What to do

Avoid the combination where possible, as strong inducers are not recommended with bortezomib. If unavoidable, monitor disease response closely.

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?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Frequently asked questions

Can I take Bortezomib with Mitotane?

MediHelp rates the interaction as major. Bortezomib and Mitotane 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. Mitotane is a strong CYP3A4 inducer and may substantially lower bortezomib exposure, risking reduced efficacy. The inducing effect can persist for weeks after mitotane is stopped.

How serious is the interaction between Bortezomib and Mitotane?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination where possible, as strong inducers are not recommended with bortezomib. If unavoidable, monitor disease response closely.

What other medicines interact with Bortezomib?

MediHelp also lists interactions of Bortezomib with, for example, Apalutamide, Carbamazepine, Etrasimod. The full list is on the Bortezomib page.

Full monographs, dosing and an interaction checker in the MediHelp app

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