Hydrochlorothiazide [Chemical/Ingredient] Hydrochlorothiazide Dihydrochlorothiazide M0010703 5487 Hydrochlorothiazide C23252 HCTZ A thiazide diuretic often considered the prototypical member of this class. It reduces the reabsorption of electrolytes from the renal tubules. This results in increased excretion of water and electrolytes, including sodium, potassium, chloride, and magnesium. It is used in the treatment of several disorders including edema, hypertension, diabetes insipidus, and hypoparathyroidism. N0000006452 D006852 Dichlothiazide Hydrochlorothiazide 2H-1,2,4-Benzothiadiazine-7-sulfonamide, 6-chloro-3,4-dihydro-, 1,1-dioxide C0020261 Chlorothiazide [Chemical/Ingredient]