Drug interactions
Telmisartan-amlodipine + Triamterene
Severity: Major
Telmisartan-amlodipine 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
Both telmisartan and triamterene reduce renal potassium loss, so together they can cause serious hyperkalemia, especially in patients with reduced kidney function or diabetes.
What this interaction means in plain words
Telmisartan-amlodipine 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.
Telmisartan-amlodipine belongs to Cardiovascular; Triamterene belongs to Cardiovascular.
Why it happens
Additive potassium retention from angiotensin receptor blockade (reduced aldosterone effect) and direct ENaC blockade by triamterene.
What to do
Avoid the combination where possible; if used, monitor serum potassium and renal function closely and avoid potassium supplements and salt substitutes.
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 Telmisartan-amlodipine
- Aliskiren + Telmisartan-amlodipine Contraindicated
- Sparsentan + Telmisartan-amlodipine Contraindicated
- Amifostine + Telmisartan-amlodipine Major
- Amiloride + Telmisartan-amlodipine Major
- Benazepril + Telmisartan-amlodipine Major
- Candesartan + Telmisartan-amlodipine Major
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 Telmisartan-amlodipine with Triamterene?
MediHelp rates the interaction as major. Telmisartan-amlodipine 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. Both telmisartan and triamterene reduce renal potassium loss, so together they can cause serious hyperkalemia, especially in patients with reduced kidney function or diabetes.
How serious is the interaction between Telmisartan-amlodipine 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 the combination where possible; if used, monitor serum potassium and renal function closely and avoid potassium supplements and salt substitutes.
What other medicines interact with Telmisartan-amlodipine?
MediHelp also lists interactions of Telmisartan-amlodipine with, for example, Aliskiren, Sparsentan, Amifostine. The full list is on the Telmisartan-amlodipine page.
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