Hydrochlorothiazide tablets belongs to diuretics, which have the effect of diuresis, swelling and lowering blood pressure. Hydrochlorothiazide tablets is a kind of thiazide diuretic, belongs to the intermediate-acting diuretic, mainly used in the treatment of various edematous diseases, such as edema caused by cardiac insufficiency, cirrhosis ascites, nephrotic syndrome, acute and chronic nephritis edema and other diseases; can also be used to treat essential hypertension; hydrochlorothiazide can also be used to treat central, renal uremic or for the treatment of idiopathic hyperuricemia. The use of hydrochlorothiazide can cause electrolyte disorders, hypotension and hyperuricemia and other side effects, in addition to allergy to hydrochlorothiazide or sulfonamides and patients with anuria are contraindicated. Therefore, the drug should be used rationally under the guidance of a doctor.