Drug interactions
Erythromycin + Infigratinib
Severity: Major
Erythromycin and Infigratinib: 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
Erythromycin may raise infigratinib concentrations through CYP3A4 inhibition, increasing toxicities such as hyperphosphatemia, ocular and skin effects.
What this interaction means in plain words
Erythromycin and Infigratinib 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.
Why it happens
CYP3A4 inhibition reduces infigratinib metabolism.
What to do
Avoid the combination and use an alternative antibiotic. If unavoidable, monitor for infigratinib toxicity, including serum phosphate and ocular symptoms.
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 Erythromycin
- Conivaptan + Erythromycin Contraindicated
- Dihydroergotamine intranasal + Erythromycin Contraindicated
- Dihydroergotamine + Erythromycin Contraindicated
- Domperidone + Erythromycin Contraindicated
- Dronedarone + Erythromycin Contraindicated
- Droperidol + Erythromycin Contraindicated
Frequently asked questions
Can I take Erythromycin with Infigratinib?
MediHelp rates the interaction as major. Erythromycin and Infigratinib 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. Erythromycin may raise infigratinib concentrations through CYP3A4 inhibition, increasing toxicities such as hyperphosphatemia, ocular and skin effects.
How serious is the interaction between Erythromycin and Infigratinib?
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 and use an alternative antibiotic. If unavoidable, monitor for infigratinib toxicity, including serum phosphate and ocular symptoms.
What other medicines interact with Erythromycin?
MediHelp also lists interactions of Erythromycin with, for example, Conivaptan, Dihydroergotamine intranasal, Dihydroergotamine. The full list is on the Erythromycin page.
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