Hydrochlorothiazide tablets belong to thiazide diuretics, which can increase the excretion of water and electrolytes such as sodium, potassium and chloride, and decrease the excretion of blood calcium, and are mostly used to treat edematous disorders due to congestive heart failure, cirrhosis ascites, nephrotic syndrome, etc.; renal or central uremic dyssynergia; and essential hypertension. There can be dry mouth, fatigue, muscle cramps, hyperuricemia, elevated blood sugar and other side effects. Elderly patients are susceptible to electrolyte disorders, renal impairment, hypotension, etc., after using the drug, so the situation should be closely monitored. Cross-allergic reactions with furosemide, bumetanide, etc., and interactions with adrenocorticotropic hormone, indomethacin, kolestyramine, etc., so you should consult a medical professional before use. Contraindications are unclear, but use with caution in the following conditions: hypercalcemia; hyperuricemia or a history of gout; hyponatremia; diabetes mellitus; anuria or severe renal insufficiency; severe hepatic insufficiency; lupus erythematosus; with excision of the sympathetic nerves; suffering from pancreatitis; athletes; and infants showing signs of jaundice. The drug may cause effects on the embryo, so pregnant women should use it after careful consideration. It should not be used by nursing women. If you need to use the drug, please be sure to take the drug under the guidance of the doctor strictly follow the doctor’s instructions, do not self-medication.