Drug interactions
Macimorelin + Siponimod
Severity: Major
Macimorelin 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
Macimorelin prolongs the QT interval and siponimod can slow heart rate and affect conduction. Together they may increase the risk of arrhythmia.
What this interaction means in plain words
Macimorelin 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.
Macimorelin belongs to Endocrine; Siponimod belongs to Central Nervous System.
Why it happens
Additive QT prolongation with siponimod-related bradycardia.
What to do
Avoid or defer macimorelin testing in patients on siponimod when feasible. If necessary, check ECG and correct electrolytes.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Macimorelin and Siponimod, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
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 Macimorelin
Frequently asked questions
Can I take Macimorelin with Siponimod?
MediHelp rates the interaction as major. Macimorelin 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. Macimorelin prolongs the QT interval and siponimod can slow heart rate and affect conduction. Together they may increase the risk of arrhythmia.
How serious is the interaction between Macimorelin 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: Avoid or defer macimorelin testing in patients on siponimod when feasible. If necessary, check ECG and correct electrolytes.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
