Drug interactions
Gemifloxacin + Ponesimod
Severity: Moderate
Gemifloxacin and Ponesimod: 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
Ponesimod slows heart rate at treatment start, and bradycardia increases susceptibility to QT-related arrhythmias. Gemifloxacin's QT-prolonging potential therefore makes the combination riskier.
What this interaction means in plain words
Gemifloxacin and Ponesimod 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.
Gemifloxacin belongs to Anti Bacterial; Ponesimod belongs to Central Nervous System.
Why it happens
Bradycardia from sphingosine-1-phosphate receptor modulation combined with the QT-prolonging effect of gemifloxacin.
What to do
Prefer a non-QT-prolonging antibiotic during ponesimod initiation. If both are needed, monitor ECG and heart rate.
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 Gemifloxacin
- Arsenic trioxide + Gemifloxacin Contraindicated
- Dofetilide + Gemifloxacin Contraindicated
- Gemifloxacin + Ibutilide Contraindicated
- Gemifloxacin + Pimozide Contraindicated
- Gemifloxacin + Thioridazine Contraindicated
- Gemifloxacin + Vandetanib Contraindicated
Other interactions of Ponesimod
- Fingolimod + Ponesimod Contraindicated
- Ponesimod + Siponimod Contraindicated
- Amiodarone + Ponesimod Major
- Amisulpride + Ponesimod Major
- Anagrelide + Ponesimod Major
- Anti-thymocyte + Ponesimod Major
Frequently asked questions
Can I take Gemifloxacin with Ponesimod?
MediHelp rates the interaction as moderate. Gemifloxacin and Ponesimod 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. Ponesimod slows heart rate at treatment start, and bradycardia increases susceptibility to QT-related arrhythmias. Gemifloxacin's QT-prolonging potential therefore makes the combination riskier.
How serious is the interaction between Gemifloxacin and Ponesimod?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer a non-QT-prolonging antibiotic during ponesimod initiation. If both are needed, monitor ECG and heart rate.
What other medicines interact with Gemifloxacin?
MediHelp also lists interactions of Gemifloxacin with, for example, Arsenic trioxide, Dofetilide, Ibutilide. The full list is on the Gemifloxacin page.
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