AMILORIDE; HYDROCHLOROTHIAZIDE treats high blood pressure and heart failure. It helps your kidneys remove more fluid and salt from your blood through the urine without losing too much potassium. It is a combination of two diuretics. Get Amiloride/HCTZ for as low as $17.95, which is 80% off the average retail price of $90.66 for the most common version, by using a GoodRx coupon.