Drug interactions
Lithium + Ponesimod
Severity: Moderate
Lithium 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 and can affect atrioventricular conduction at initiation, while lithium can cause sinus node dysfunction and QT changes. Together they may increase the risk of bradycardia and arrhythmia.
What this interaction means in plain words
Lithium 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.
Lithium belongs to Central Nervous System; Ponesimod belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic effects on cardiac conduction and heart rate.
What to do
Obtain a baseline ECG before starting ponesimod and monitor heart rate during titration. Seek cardiology input in patients with existing conduction disease or bradycardia.
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 Lithium
- Lithium + Thioridazine Contraindicated
- Lithium + Vandetanib Contraindicated
- Aceclofenac + Lithium Major
- Acemetacin + Lithium Major
- Amisulpride + Lithium Major
- Amlodipine-benazepril + Lithium Major
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 Lithium with Ponesimod?
MediHelp rates the interaction as moderate. Lithium 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 and can affect atrioventricular conduction at initiation, while lithium can cause sinus node dysfunction and QT changes. Together they may increase the risk of bradycardia and arrhythmia.
How serious is the interaction between Lithium 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: Obtain a baseline ECG before starting ponesimod and monitor heart rate during titration. Seek cardiology input in patients with existing conduction disease or bradycardia.
What other medicines interact with Lithium?
MediHelp also lists interactions of Lithium with, for example, Thioridazine, Vandetanib, Aceclofenac. The full list is on the Lithium page.
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