Drug interactions
Leuprolide + Siponimod
Severity: Moderate
Leuprolide and Siponimod: 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
Androgen deprivation with leuprolide can prolong the QT interval. Siponimod's bradycardic effects may add to the arrhythmic risk.
What this interaction means in plain words
Leuprolide and Siponimod 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.
Leuprolide belongs to Endocrine; Siponimod belongs to Central Nervous System.
Why it happens
Additive QT prolongation, with siponimod also slowing heart rate.
What to do
Obtain a baseline ECG and correct electrolyte abnormalities. Monitor the QTc and heart rate, especially in patients with other risk factors.
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 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 Leuprolide
- Leuprolide + Pimozide Contraindicated
- Leuprolide + Thioridazine Contraindicated
- Amisulpride + Leuprolide Major
- Arsenic trioxide + Leuprolide Major
- Artemether / lumefantrine + Leuprolide Major
- Disopyramide + Leuprolide Major
Frequently asked questions
Can I take Leuprolide with Siponimod?
MediHelp rates the interaction as moderate. Leuprolide and Siponimod 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. Androgen deprivation with leuprolide can prolong the QT interval. Siponimod's bradycardic effects may add to the arrhythmic risk.
How serious is the interaction between Leuprolide and Siponimod?
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 and correct electrolyte abnormalities. Monitor the QTc and heart rate, especially in patients with other risk factors.
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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