Drug interactions
Amiodarone + Selpercatinib
Severity: Major
Amiodarone and Selpercatinib: 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, so giving them together may increase the risk of torsades de pointes. The risk is greater with electrolyte disturbances, bradycardia or structural heart disease.
What this interaction means in plain words
Amiodarone and Selpercatinib 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.
Amiodarone belongs to Cardiovascular; Selpercatinib belongs to Oncology.
Why it happens
Additive pharmacodynamic QT prolongation through cardiac repolarization effects.
What to do
Obtain a baseline and follow-up ECG and correct potassium, magnesium and calcium before and during treatment. Consider an alternative antiarrhythmic, or reduce or interrupt selpercatinib if QTc becomes markedly prolonged.
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 Amiodarone
- Amiodarone + Amisulpride Contraindicated
- Amiodarone + Arsenic trioxide Contraindicated
- Amiodarone + Dofetilide Contraindicated
- Amiodarone + Dronedarone Contraindicated
- Amiodarone + Droperidol Contraindicated
- Amiodarone + Eliglustat Contraindicated
Other interactions of Selpercatinib
Frequently asked questions
Can I take Amiodarone with Selpercatinib?
MediHelp rates the interaction as major. Amiodarone and Selpercatinib 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, so giving them together may increase the risk of torsades de pointes. The risk is greater with electrolyte disturbances, bradycardia or structural heart disease.
How serious is the interaction between Amiodarone and Selpercatinib?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline and follow-up ECG and correct potassium, magnesium and calcium before and during treatment. Consider an alternative antiarrhythmic, or reduce or interrupt selpercatinib if QTc becomes markedly prolonged.
What other medicines interact with Amiodarone?
MediHelp also lists interactions of Amiodarone with, for example, Amisulpride, Arsenic trioxide, Dofetilide. The full list is on the Amiodarone page.
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