Drug interactions
Fingolimod + Foscarnet
Severity: Major
Fingolimod and Foscarnet: 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
Fingolimod causes bradycardia and has been associated with QT prolongation, while foscarnet can prolong QT and disturb electrolytes. Together they may increase the risk of serious arrhythmia.
What this interaction means in plain words
Fingolimod and Foscarnet 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.
Fingolimod belongs to Central Nervous System; Foscarnet belongs to Anti Virals.
Why it happens
Additive QT prolongation, with fingolimod-induced bradycardia increasing proarrhythmic susceptibility.
What to do
Avoid the combination where possible; if unavoidable, monitor ECG and heart rate and correct electrolytes, with extended cardiac observation around fingolimod initiation.
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 Foscarnet
- Cidofovir + Foscarnet Contraindicated
- Foscarnet + Pimozide Contraindicated
- Foscarnet + Thioridazine Contraindicated
- Foscarnet + Vandetanib Contraindicated
- Adagrasib + Foscarnet Major
- Adefovir + Foscarnet Major
Other interactions of Fingolimod
- Adenovirus types 4 and 7 live + Fingolimod Contraindicated
- Bcg vaccine live + Fingolimod Contraindicated
- Fingolimod + Pimozide Contraindicated
- Fingolimod + Ponesimod Contraindicated
- Fingolimod + Quinidine Contraindicated
- Fingolimod + Siponimod Contraindicated
Frequently asked questions
Can I take Fingolimod with Foscarnet?
MediHelp rates the interaction as major. Fingolimod and Foscarnet 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. Fingolimod causes bradycardia and has been associated with QT prolongation, while foscarnet can prolong QT and disturb electrolytes. Together they may increase the risk of serious arrhythmia.
How serious is the interaction between Fingolimod and Foscarnet?
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 unavoidable, monitor ECG and heart rate and correct electrolytes, with extended cardiac observation around fingolimod initiation.
What other medicines interact with Foscarnet?
MediHelp also lists interactions of Foscarnet with, for example, Cidofovir, Pimozide, Thioridazine. The full list is on the Foscarnet page.
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