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.