Drug interactions
Apalutamide + Zanubrutinib
Severity: Major
Apalutamide and Zanubrutinib: 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
Apalutamide is a strong inducer of CYP3A4 and can substantially lower zanubrutinib exposure. Reduced exposure may lead to loss of BTK inhibition and weaker disease control.
What this interaction means in plain words
Apalutamide and Zanubrutinib 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.
Apalutamide belongs to Endocrine; Zanubrutinib belongs to Oncology.
Why it happens
Apalutamide induces CYP3A4 (and P-gp), increasing the metabolic clearance of zanubrutinib.
What to do
Avoid the combination where possible and choose a non-inducing alternative for prostate cancer therapy. If coadministration is unavoidable, monitor closely for reduced hematologic response and follow labeling for dose adjustment.
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 Apalutamide
- Apalutamide + Cabotegravir Contraindicated
- Apalutamide + Cobicistat Contraindicated
- Apalutamide + Doravirine Contraindicated
- Apalutamide + Elbasvir / grazoprevir Contraindicated
- Apalutamide + Ensitrelvir Contraindicated
- Apalutamide + Fostemsavir Contraindicated
Other interactions of Zanubrutinib
Frequently asked questions
Can I take Apalutamide with Zanubrutinib?
MediHelp rates the interaction as major. Apalutamide and Zanubrutinib 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. Apalutamide is a strong inducer of CYP3A4 and can substantially lower zanubrutinib exposure. Reduced exposure may lead to loss of BTK inhibition and weaker disease control.
How serious is the interaction between Apalutamide and Zanubrutinib?
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 and choose a non-inducing alternative for prostate cancer therapy. If coadministration is unavoidable, monitor closely for reduced hematologic response and follow labeling for dose adjustment.
What other medicines interact with Apalutamide?
MediHelp also lists interactions of Apalutamide with, for example, Cabotegravir, Cobicistat, Doravirine. The full list is on the Apalutamide page.
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