Drug interactions
Brentuximab + Ritonavir
Severity: Major
Brentuximab and Ritonavir: 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
Ritonavir is a strong CYP3A4 inhibitor and can increase MMAE exposure from brentuximab vedotin. Neutropenia and peripheral neuropathy may be more likely.
What this interaction means in plain words
Brentuximab and Ritonavir 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.
Brentuximab belongs to Oncology; Ritonavir belongs to Anti Virals.
Why it happens
Strong CYP3A4 inhibition reduces MMAE clearance.
What to do
Monitor blood counts and neuropathy closely, and consider an alternative to ritonavir. Delay or reduce brentuximab if neutropenia or neuropathy develops.
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 Brentuximab
- Bleomycin + Brentuximab Contraindicated
- Brentuximab + Dengue vaccine Major
- Brentuximab + Etrasimod Major
- Brentuximab + Idelalisib Major
- Brentuximab + Levoketoconazole Major
- Brentuximab + Nefazodone Major
Other interactions of Ritonavir
- Alfuzosin + Ritonavir Contraindicated
- Amiodarone + Ritonavir Contraindicated
- Avanafil + Ritonavir Contraindicated
- Colchicine + Ritonavir Contraindicated
- Dronedarone + Ritonavir Contraindicated
- Eletriptan + Ritonavir Contraindicated
Frequently asked questions
Can I take Brentuximab with Ritonavir?
MediHelp rates the interaction as major. Brentuximab and Ritonavir 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. Ritonavir is a strong CYP3A4 inhibitor and can increase MMAE exposure from brentuximab vedotin. Neutropenia and peripheral neuropathy may be more likely.
How serious is the interaction between Brentuximab and Ritonavir?
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 blood counts and neuropathy closely, and consider an alternative to ritonavir. Delay or reduce brentuximab if neutropenia or neuropathy develops.
What other medicines interact with Brentuximab?
MediHelp also lists interactions of Brentuximab with, for example, Bleomycin, Dengue vaccine, Etrasimod. The full list is on the Brentuximab page.
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