Drug interactions
Darunavir + Regorafenib
Severity: Major
Darunavir and Regorafenib: 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
Darunavir, especially when boosted with ritonavir or cobicistat, strongly inhibits CYP3A4 and may increase regorafenib exposure, with unpredictable changes in active metabolites.
What this interaction means in plain words
Darunavir and Regorafenib 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.
Darunavir belongs to Anti Virals; Regorafenib belongs to Oncology.
Why it happens
CYP3A4 inhibition by boosted darunavir reduces regorafenib clearance.
What to do
Avoid the combination if possible. If coadministration is necessary, monitor liver function and for adverse reactions.
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 Regorafenib
Other interactions of Darunavir
- Alfuzosin + Darunavir Contraindicated
- Avanafil + Darunavir Contraindicated
- Darunavir + Dronedarone Contraindicated
- Darunavir + Eletriptan Contraindicated
- Darunavir + Ergotamine Contraindicated
- Darunavir + Flibanserin Contraindicated
Frequently asked questions
Can I take Darunavir with Regorafenib?
MediHelp rates the interaction as major. Darunavir and Regorafenib 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. Darunavir, especially when boosted with ritonavir or cobicistat, strongly inhibits CYP3A4 and may increase regorafenib exposure, with unpredictable changes in active metabolites.
How serious is the interaction between Darunavir and Regorafenib?
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 if possible. If coadministration is necessary, monitor liver function and for adverse reactions.
What other medicines interact with Regorafenib?
MediHelp also lists interactions of Regorafenib with, for example, Apalutamide, Atazanavir, Carbamazepine. The full list is on the Regorafenib page.
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