Thiazide diuretics are medium-acting diuretics that are potassium-removing diuretics. Diuretics in the thiazide class include hydrochlorothiazide, furosemide, torasemide, and bumetanide. The use of thiazide diuretics may cause water-electrolyte disorders, such as hyponatremia and hypokalemia, so it is important to have regular water-electrolyte checks during the use of these drugs. In addition, thiazide diuretics and sulfonamides have a history of cross-allergy, so patients with a history of sulfonamide allergy should not use thiazide diuretics. Thiazide diuretics may cause elevated blood glucose and hyperuricemia, so they should be used with caution or banned in patients with diabetes or gout.