Drug interactions
Nortriptyline + Sotalol
Severity: Major
Nortriptyline and Sotalol: 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
Nortriptyline can prolong the QT interval and slow cardiac conduction, and sotalol has a strong dose-related QT effect. Together they raise the risk of ventricular arrhythmias including torsades de pointes.
What this interaction means in plain words
Nortriptyline and Sotalol 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; Sotalol belongs to Cardiovascular.
Why it happens
Additive QT prolongation through cardiac potassium channel blockade.
What to do
Avoid if possible and consider an antidepressant with less cardiac effect. If used together, obtain a baseline and follow-up ECG and maintain normal 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?
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Other interactions of Sotalol
- Arsenic trioxide + Sotalol Contraindicated
- Artemether / lumefantrine + Sotalol Contraindicated
- Disopyramide + Sotalol Contraindicated
- Dofetilide + Sotalol Contraindicated
- Dronedarone + Sotalol Contraindicated
- Droperidol + Sotalol Contraindicated
Other interactions of Nortriptyline
- Disopyramide + Nortriptyline Contraindicated
- Dofetilide + Nortriptyline Contraindicated
- Dronedarone + Nortriptyline Contraindicated
- Ibutilide + Nortriptyline Contraindicated
- Isocarboxazid + Nortriptyline Contraindicated
- Methylene blue + Nortriptyline Contraindicated
Frequently asked questions
Can I take Nortriptyline with Sotalol?
MediHelp rates the interaction as major. Nortriptyline and Sotalol 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 can prolong the QT interval and slow cardiac conduction, and sotalol has a strong dose-related QT effect. Together they raise the risk of ventricular arrhythmias including torsades de pointes.
How serious is the interaction between Nortriptyline and Sotalol?
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 if possible and consider an antidepressant with less cardiac effect. If used together, obtain a baseline and follow-up ECG and maintain normal electrolytes.
What other medicines interact with Sotalol?
MediHelp also lists interactions of Sotalol with, for example, Arsenic trioxide, Artemether / lumefantrine, Disopyramide. The full list is on the Sotalol page.
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