The combination of Hydrochlorothiazide and Triamterene is used to treat fluid retention (edema) and high blood pressure (hypertension). Hydrochlorothiazide is a thiazide diuretic (water pill) that helps prevent your body from absorbing too much salt, which can cause fluid retention. Triamterene is a potassium-sparing diuretic that also prevents your body from absorbing too much salt…