Drug interactions
Eribulin + Fostemsavir
Severity: Moderate
Eribulin and Fostemsavir: moderate 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
Eribulin prolongs QT, and fostemsavir has caused QT prolongation at supratherapeutic doses. At recommended doses the added risk is likely small.
What this interaction means in plain words
Eribulin and Fostemsavir can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Eribulin belongs to Oncology; Fostemsavir belongs to Anti Virals.
Why it happens
Additive QT prolongation, mainly theoretical at standard fostemsavir doses.
What to do
Obtain a baseline ECG and monitor electrolytes. Repeat ECG if other QT-prolonging risks are present.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Eribulin
Other interactions of Fostemsavir
- Apalutamide + Fostemsavir Contraindicated
- Carbamazepine + Fostemsavir Contraindicated
- Enzalutamide + Fostemsavir Contraindicated
- Fostemsavir + Mitotane Contraindicated
- Fostemsavir + Phenytoin Contraindicated
- Fostemsavir + Rifampicin Contraindicated
Frequently asked questions
Can I take Eribulin with Fostemsavir?
MediHelp rates the interaction as moderate. Eribulin and Fostemsavir can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Eribulin prolongs QT, and fostemsavir has caused QT prolongation at supratherapeutic doses. At recommended doses the added risk is likely small.
How serious is the interaction between Eribulin and Fostemsavir?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG and monitor electrolytes. Repeat ECG if other QT-prolonging risks are present.
What other medicines interact with Eribulin?
MediHelp also lists interactions of Eribulin with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Eribulin page.
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