Drug interactions
Hydroxyzine + Ponesimod
Severity: Major
Hydroxyzine and Ponesimod: 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
Hydroxyzine can prolong the QT interval and has been linked to torsades de pointes. Ponesimod causes initial bradycardia and has been associated with QT effects, so combined use raises arrhythmia risk, especially at treatment initiation.
What this interaction means in plain words
Hydroxyzine and Ponesimod 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.
Hydroxyzine belongs to Respiratory; Ponesimod belongs to Central Nervous System.
Why it happens
Additive QT prolongation and bradycardia, which promote torsades de pointes.
What to do
Avoid the combination if possible and choose a non-QT-prolonging antihistamine. If needed, obtain a baseline ECG, correct potassium and magnesium, and monitor heart rate and QTc.
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 Hydroxyzine
- Droperidol + Hydroxyzine Contraindicated
- Hydroxyzine + Pimozide Contraindicated
- Hydroxyzine + Thioridazine Contraindicated
- Hydroxyzine + Vandetanib Contraindicated
- Alfentanil + Hydroxyzine Major
- Amiodarone + Hydroxyzine 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 Hydroxyzine with Ponesimod?
MediHelp rates the interaction as major. Hydroxyzine and Ponesimod 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. Hydroxyzine can prolong the QT interval and has been linked to torsades de pointes. Ponesimod causes initial bradycardia and has been associated with QT effects, so combined use raises arrhythmia risk, especially at treatment initiation.
How serious is the interaction between Hydroxyzine and Ponesimod?
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 if possible and choose a non-QT-prolonging antihistamine. If needed, obtain a baseline ECG, correct potassium and magnesium, and monitor heart rate and QTc.
What other medicines interact with Hydroxyzine?
MediHelp also lists interactions of Hydroxyzine with, for example, Droperidol, Pimozide, Thioridazine. The full list is on the Hydroxyzine page.
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