Drug interactions
Sotalol + Torsemide
Severity: Major
Sotalol and Torsemide: 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
Torsemide-induced hypokalemia and hypomagnesemia increase the risk of QT prolongation and torsades de pointes with sotalol. This is clinically important because sotalol has dose-dependent proarrhythmic effects.
What this interaction means in plain words
Sotalol and Torsemide 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.
Sotalol belongs to Cardiovascular; Torsemide belongs to Cardiovascular.
Why it happens
Loop diuretic electrolyte depletion augments the QT-prolonging action of sotalol, a class III antiarrhythmic.
What to do
Correct potassium and magnesium before starting sotalol and monitor electrolytes and QTc regularly. Keep potassium in the normal range and reassess if QTc lengthens.
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 Torsemide
Other interactions of Sotalol
- Arsenic trioxide + Sotalol Contraindicated
- Artemether / lumefantrine + Sotalol Contraindicated
- Disopyramide + Sotalol Contraindicated
- Dofetilide + Sotalol Contraindicated
- Dronedarone + Sotalol Contraindicated
- Droperidol + Sotalol Contraindicated
Frequently asked questions
Can I take Sotalol with Torsemide?
MediHelp rates the interaction as major. Sotalol and Torsemide 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. Torsemide-induced hypokalemia and hypomagnesemia increase the risk of QT prolongation and torsades de pointes with sotalol. This is clinically important because sotalol has dose-dependent proarrhythmic effects.
How serious is the interaction between Sotalol and Torsemide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Correct potassium and magnesium before starting sotalol and monitor electrolytes and QTc regularly. Keep potassium in the normal range and reassess if QTc lengthens.
What other medicines interact with Torsemide?
MediHelp also lists interactions of Torsemide with, for example, Amikacin, Amiodarone, Carbenoxolone. The full list is on the Torsemide page.
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