Side effects of diuretics include hypokalemia, hypotension, hyperuricemia, and transient hearing loss. Usually most diuretics excrete large amounts of potassium along with diuresis, which can induce hypokalemia. And some patients may also have low magnesium, low blood pressure, low sodium, and even hypovolemic shock. When patients use loop diuretics and potassium-retaining diuretics, uric acid retention will also occur, which can induce hyperuricemia. At the same time, if patients with prostate hyperplasia use acute diuretics, there may also be acute urinary retention, and large doses of medullary loop diuretics also have a certain ototoxicity, the patient may experience tinnitus, hearing impairment, mostly transient. Therefore, patients need to closely observe their own situation during the administration of diuretics, and regularly measure their weight and check their blood pressure. It is recommended that patients use diuretics according to their own situation, strictly under the guidance of the doctor, and pay attention to its related matters.