Drug interactions
Pazopanib + Siponimod
Severity: Major
Pazopanib and Siponimod: 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
Both drugs can prolong the QT interval, and siponimod also slows heart rate at treatment initiation. Combined use may increase the risk of torsades de pointes and serious arrhythmia, especially with bradycardia or electrolyte disturbance.
What this interaction means in plain words
Pazopanib and Siponimod 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.
Pazopanib belongs to Oncology; Siponimod belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic QT prolongation, with siponimod-related bradycardia increasing arrhythmia susceptibility.
What to do
Prefer an alternative where possible; if both are needed, obtain a baseline ECG, correct potassium and magnesium, and monitor ECG during siponimod initiation and afterward.
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 Siponimod
- Cladribine + Siponimod Contraindicated
- Fingolimod + Siponimod Contraindicated
- Fluconazole + Siponimod Contraindicated
- Influenza virus vaccine quadrivalent intranasal + Siponimod Contraindicated
- Ponesimod + Siponimod Contraindicated
- Siponimod + Thioridazine Contraindicated
Other interactions of Pazopanib
- Adagrasib + Pazopanib Major
- Amiodarone + Pazopanib Major
- Amisulpride + Pazopanib Major
- Amobarbital + Pazopanib Major
- Anagrelide + Pazopanib Major
- Apalutamide + Pazopanib Major
Frequently asked questions
Can I take Pazopanib with Siponimod?
MediHelp rates the interaction as major. Pazopanib and Siponimod 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. Both drugs can prolong the QT interval, and siponimod also slows heart rate at treatment initiation. Combined use may increase the risk of torsades de pointes and serious arrhythmia, especially with bradycardia or electrolyte disturbance.
How serious is the interaction between Pazopanib and Siponimod?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer an alternative where possible; if both are needed, obtain a baseline ECG, correct potassium and magnesium, and monitor ECG during siponimod initiation and afterward.
What other medicines interact with Siponimod?
MediHelp also lists interactions of Siponimod with, for example, Cladribine, Fingolimod, Fluconazole. The full list is on the Siponimod page.
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