Triamterene is a potassium-sparing diuretic (water pill) that prevents your body from absorbing too much salt and keeps your potassium levels from getting too low. Triamterene is used to treat fluid retention (edema) in people with congestive heart failure, cirrhosis of the liver, or a kidney condition called nephrotic syndrome. Triamterene is also used to treat edema caused by having too much aldosterone in your body. Aldosterone is a hormone produced by the adrenal glands to help regulate the salt and water balance in your body. Triamterene may also be used for purposes other than those listed in this medication guide.
Dyrenium is a potassium-sparing diuretic that treats high blood pressure and edema. It treats edema brought about by diseases such as congestive heart failure, kidney disease, and liver disease. It functions by enabling your body to flush out extra salt and water, while preventing excess loss of potassium.