Drug interactions
Crizotinib + Neratinib
Severity: Major
Crizotinib and Neratinib: 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
Neratinib is mainly metabolized by CYP3A4, and crizotinib may increase its exposure. This can worsen diarrhea, hepatotoxicity and other adverse effects.
What this interaction means in plain words
Crizotinib and Neratinib 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.
Crizotinib belongs to Oncology; Neratinib belongs to Oncology.
Why it happens
Crizotinib inhibits CYP3A4 metabolism of neratinib.
What to do
Avoid the combination where possible. If used, monitor for severe diarrhea and liver enzyme elevation, with antidiarrheal prophylaxis.
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 Crizotinib
- Crizotinib + Flibanserin Contraindicated
- Crizotinib + Lomitapide Contraindicated
- Crizotinib + Lonafarnib Contraindicated
- Crizotinib + Pimozide Contraindicated
- Crizotinib + Saquinavir Contraindicated
- Crizotinib + Thioridazine Contraindicated
Other interactions of Neratinib
- Amiodarone + Neratinib Major
- Amobarbital + Neratinib Major
- Aprepitant + Neratinib Major
- Armodafinil + Neratinib Major
- Bosentan + Neratinib Major
- Carbamazepine + Neratinib Major
Frequently asked questions
Can I take Crizotinib with Neratinib?
MediHelp rates the interaction as major. Crizotinib and Neratinib 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. Neratinib is mainly metabolized by CYP3A4, and crizotinib may increase its exposure. This can worsen diarrhea, hepatotoxicity and other adverse effects.
How serious is the interaction between Crizotinib and Neratinib?
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. If used, monitor for severe diarrhea and liver enzyme elevation, with antidiarrheal prophylaxis.
What other medicines interact with Crizotinib?
MediHelp also lists interactions of Crizotinib with, for example, Flibanserin, Lomitapide, Lonafarnib. The full list is on the Crizotinib page.
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