Drug interactions
Clarithromycin + Neratinib
Severity: Major
Clarithromycin 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
Clarithromycin increases neratinib exposure, raising the risk of diarrhea, hepatotoxicity and other adverse effects.
What this interaction means in plain words
Clarithromycin 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.
Clarithromycin belongs to Anti Bacterial; Neratinib belongs to Oncology.
Why it happens
Strong CYP3A4 (and P-gp) inhibition reduces neratinib clearance.
What to do
Avoid concurrent use and select an alternative antibiotic. If unavoidable, monitor closely for diarrhea and liver toxicity.
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 Clarithromycin
- Astemizole + Clarithromycin Contraindicated
- Avanafil + Clarithromycin Contraindicated
- Cisapride + Clarithromycin Contraindicated
- Clarithromycin + Colchicine Contraindicated
- Clarithromycin + Conivaptan Contraindicated
- Clarithromycin + Dihydroergotamine 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 Clarithromycin with Neratinib?
MediHelp rates the interaction as major. Clarithromycin 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. Clarithromycin increases neratinib exposure, raising the risk of diarrhea, hepatotoxicity and other adverse effects.
How serious is the interaction between Clarithromycin 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 concurrent use and select an alternative antibiotic. If unavoidable, monitor closely for diarrhea and liver toxicity.
What other medicines interact with Clarithromycin?
MediHelp also lists interactions of Clarithromycin with, for example, Astemizole, Avanafil, Cisapride. The full list is on the Clarithromycin page.
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