Drug interactions
Sacubitril / valsartan + Triamterene
Severity: Major
Sacubitril / valsartan and Triamterene: 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
Valsartan blocks angiotensin II receptors, reducing aldosterone and promoting potassium retention. Combined with triamterene, there is a substantial risk of hyperkalemia, especially in renal impairment, diabetes or heart failure.
What this interaction means in plain words
Sacubitril / valsartan and Triamterene 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.
Why it happens
Reduced aldosterone effect from angiotensin receptor blockade combined with triamterene's epithelial sodium channel blockade causes additive potassium retention.
What to do
Avoid routine combination; if needed, monitor serum potassium and renal function within the first weeks and after dose changes, and stop triamterene if potassium rises.
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 Triamterene
- Amiloride + Triamterene Contraindicated
- Eplerenone + Triamterene Contraindicated
- Potassium citrate / citric acid + Triamterene Contraindicated
- Potassium citrate + Triamterene Contraindicated
- Spironolactone + Triamterene Contraindicated
- Aceclofenac + Triamterene Major
Frequently asked questions
Can I take Sacubitril / valsartan with Triamterene?
MediHelp rates the interaction as major. Sacubitril / valsartan and Triamterene 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. Valsartan blocks angiotensin II receptors, reducing aldosterone and promoting potassium retention. Combined with triamterene, there is a substantial risk of hyperkalemia, especially in renal impairment, diabetes or heart failure.
How serious is the interaction between Sacubitril / valsartan and Triamterene?
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 routine combination; if needed, monitor serum potassium and renal function within the first weeks and after dose changes, and stop triamterene if potassium rises.
What other medicines interact with Triamterene?
MediHelp also lists interactions of Triamterene with, for example, Amiloride, Eplerenone, Potassium citrate / citric acid. The full list is on the Triamterene page.
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