The advantage of diuretic antihypertensive drugs is that they are suitable for patients with water-sodium retention and salty diet, and the disadvantage is that they are prone to cause adverse reactions such as abnormal blood potassium. 1. Advantages: diuretics mainly exert antihypertensive effects through sodium excretion and reduction of extracellular volume, and the onset of antihypertensive effect is relatively slow, smooth, and lasts for a long time. Diuretics can be used for mild to moderate hypertension, simple systolic hypertension, sensitive hypertension and so on. 2. Disadvantages: thiazide diuretics antihypertensive can cause hypokalemia, affect the metabolism of blood lipids, blood glucose, blood uric acid, so it is recommended to use small doses. There may also be fatigue, increased urine output, gout patients are prohibited. Potassium-preserving diuretics can cause hyperkalemia, renal insufficiency is prohibited. It is recommended to use diuretics to lower blood pressure under the guidance of a doctor, not blindly self-medication.