What is triamterene (Dyrenium)?

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Triamterene (Dyrenium) is a prescription diuretic that gets rid of excess fluid in the body and the lungs that can make it difficult to breathe. The excess fluid is usually caused by congestive heart failure, liver disease or kidney dysfunction. Triamterene can treat high blood pressure as well. It comes in a capsule form and is taken orally.

Triamterene is in a class of medications known as potassium-sparing diuretics. Triamterene helps the kidneys produce more urine, thereby getting rid of excess salt that causes water retention. However, it does not get rid of potassium.