Wiktionary
triamterene
n. A potassium-sparing diuretic used in combination with thiazide diuretics for the treatment of hypertension and edema.
Wikipedia
Triamterene
Triamterene (trade name Dyrenium) is a potassium-sparing diuretic used in combination with thiazide diuretics for the treatment of hypertension and edema. In combination with hydrochlorothiazide, it is marketed under the names Maxzide and Dyazide.