Drug interactions
Nortriptyline + Selpercatinib
Severity: Major
Nortriptyline 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
Selpercatinib can prolong the QT interval, and nortriptyline has QT and conduction effects. Used together they may increase the risk of serious ventricular arrhythmias, especially with electrolyte disturbances or heart disease.
What this interaction means in plain words
Nortriptyline 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.
Nortriptyline belongs to Central Nervous System; Selpercatinib belongs to Oncology.
Why it happens
Additive QT interval prolongation.
What to do
Check ECG and electrolytes before and during therapy, and correct potassium and magnesium. Consider an alternative antidepressant with less QT effect if the QTc rises significantly.
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 Nortriptyline
- Disopyramide + Nortriptyline Contraindicated
- Dofetilide + Nortriptyline Contraindicated
- Dronedarone + Nortriptyline Contraindicated
- Ibutilide + Nortriptyline Contraindicated
- Isocarboxazid + Nortriptyline Contraindicated
- Methylene blue + Nortriptyline Contraindicated
Other interactions of Selpercatinib
Frequently asked questions
Can I take Nortriptyline with Selpercatinib?
MediHelp rates the interaction as major. Nortriptyline 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. Selpercatinib can prolong the QT interval, and nortriptyline has QT and conduction effects. Used together they may increase the risk of serious ventricular arrhythmias, especially with electrolyte disturbances or heart disease.
How serious is the interaction between Nortriptyline 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: Check ECG and electrolytes before and during therapy, and correct potassium and magnesium. Consider an alternative antidepressant with less QT effect if the QTc rises significantly.
What other medicines interact with Nortriptyline?
MediHelp also lists interactions of Nortriptyline with, for example, Disopyramide, Dofetilide, Dronedarone. The full list is on the Nortriptyline page.
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