Drug interactions
Potassium chloride + Triamterene
Severity: Major
Potassium chloride 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
Triamterene reduces potassium excretion and potassium chloride supplies additional potassium, which can produce severe or fatal hyperkalemia. Risk is higher with renal impairment or diabetes.
What this interaction means in plain words
Potassium chloride 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.
Potassium chloride belongs to Gastrointestinal Tract; Triamterene belongs to Cardiovascular.
Why it happens
Triamterene blocks distal tubular potassium secretion while the supplement adds potassium load, causing additive potassium retention.
What to do
Avoid routine co-prescription; stop potassium supplements when triamterene is started unless hypokalemia persists. If used, monitor serum potassium and renal function frequently.
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
Other interactions of Potassium chloride
Frequently asked questions
Can I take Potassium chloride with Triamterene?
MediHelp rates the interaction as major. Potassium chloride 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. Triamterene reduces potassium excretion and potassium chloride supplies additional potassium, which can produce severe or fatal hyperkalemia. Risk is higher with renal impairment or diabetes.
How serious is the interaction between Potassium chloride 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 co-prescription; stop potassium supplements when triamterene is started unless hypokalemia persists. If used, monitor serum potassium and renal function frequently.
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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