Drug interactions
Bortezomib + Idelalisib
Severity: Major
Bortezomib and Idelalisib: 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
Idelalisib is a strong CYP3A inhibitor, and bortezomib is partly cleared by CYP3A4. Strong inhibitors such as ketoconazole have increased bortezomib exposure, so toxicity such as neuropathy and thrombocytopenia may rise. Idelalisib also carries risks of serious infection and diarrhea.
What this interaction means in plain words
Bortezomib and Idelalisib 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; Idelalisib belongs to Oncology.
Why it happens
Idelalisib inhibits CYP3A4, reducing bortezomib clearance.
What to do
Monitor closely for neuropathy, cytopenias and infection, and consider a bortezomib dose reduction. Choose an alternative to idelalisib if possible.
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?
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Other interactions of Bortezomib
- Apalutamide + Bortezomib Major
- Bortezomib + Carbamazepine Major
- Bortezomib + Etrasimod Major
- Bortezomib + Fosphenytoin Major
- Bortezomib + Lonafarnib Major
- Bortezomib + Mitotane Major
Other interactions of Idelalisib
- Alfuzosin + Idelalisib Contraindicated
- Cisapride + Idelalisib Contraindicated
- Dihydroergotamine + Idelalisib Contraindicated
- Dronedarone + Idelalisib Contraindicated
- Eletriptan + Idelalisib Contraindicated
- Eplerenone + Idelalisib Contraindicated
Frequently asked questions
Can I take Bortezomib with Idelalisib?
MediHelp rates the interaction as major. Bortezomib and Idelalisib 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. Idelalisib is a strong CYP3A inhibitor, and bortezomib is partly cleared by CYP3A4. Strong inhibitors such as ketoconazole have increased bortezomib exposure, so toxicity such as neuropathy and thrombocytopenia may rise. Idelalisib also carries risks of serious infection and diarrhea.
How serious is the interaction between Bortezomib and Idelalisib?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor closely for neuropathy, cytopenias and infection, and consider a bortezomib dose reduction. Choose an alternative to idelalisib if possible.
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.
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