Drug interactions
Clarithromycin + Pralsetinib
Severity: Major
Clarithromycin and Pralsetinib: 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 can increase pralsetinib exposure, which may increase adverse effects such as hepatotoxicity, hypertension, pneumonitis, hemorrhage and myelosuppression.
What this interaction means in plain words
Clarithromycin and Pralsetinib 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; Pralsetinib belongs to Oncology.
Why it happens
Clarithromycin inhibits CYP3A4, reducing pralsetinib metabolism.
What to do
Prefer an alternative antibiotic. If a combined strong CYP3A4 inhibitor is required, reduce the pralsetinib dose per labeling and monitor liver tests and blood pressure.
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 Pralsetinib
Frequently asked questions
Can I take Clarithromycin with Pralsetinib?
MediHelp rates the interaction as major. Clarithromycin and Pralsetinib 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 can increase pralsetinib exposure, which may increase adverse effects such as hepatotoxicity, hypertension, pneumonitis, hemorrhage and myelosuppression.
How serious is the interaction between Clarithromycin and Pralsetinib?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer an alternative antibiotic. If a combined strong CYP3A4 inhibitor is required, reduce the pralsetinib dose per labeling and monitor liver tests and blood pressure.
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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