Drug interactions
Indapamide + Ranolazine
Severity: Major
Indapamide and Ranolazine: 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
Ranolazine prolongs the QT interval in a dose-related manner, and indapamide can add to this through its own QT effect and through electrolyte depletion. The combination increases the chance of torsades de pointes, especially when potassium or magnesium is low.
What this interaction means in plain words
Indapamide and Ranolazine 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.
Indapamide belongs to Cardiovascular; Ranolazine belongs to Cardiovascular.
Why it happens
Additive QT prolongation, with diuretic-induced hypokalemia and hypomagnesemia increasing arrhythmia susceptibility.
What to do
Correct and monitor potassium and magnesium and obtain a baseline and follow-up ECG. Consider an alternative diuretic or antianginal if the QTc becomes 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 Indapamide
Other interactions of Ranolazine
- Adagrasib + Ranolazine Contraindicated
- Amobarbital + Ranolazine Contraindicated
- Apalutamide + Ranolazine Contraindicated
- Butabarbital + Ranolazine Contraindicated
- Carbamazepine + Ranolazine Contraindicated
- Clarithromycin + Ranolazine Contraindicated
Frequently asked questions
Can I take Indapamide with Ranolazine?
MediHelp rates the interaction as major. Indapamide and Ranolazine 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. Ranolazine prolongs the QT interval in a dose-related manner, and indapamide can add to this through its own QT effect and through electrolyte depletion. The combination increases the chance of torsades de pointes, especially when potassium or magnesium is low.
How serious is the interaction between Indapamide and Ranolazine?
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 and monitor potassium and magnesium and obtain a baseline and follow-up ECG. Consider an alternative diuretic or antianginal if the QTc becomes prolonged.
What other medicines interact with Indapamide?
MediHelp also lists interactions of Indapamide with, for example, Adagrasib, Amifostine, Amiodarone. The full list is on the Indapamide page.
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