There are only two types of potassium-preserving diuretics in general: one is spironolactone and the other is aminoglutethimide. Both of these drugs are potassium-preserving diuretics. If patients use these two drugs to lower blood pressure, they must have their electrolytes reviewed regularly to avoid causing hyperkalemia in the body due to prolonged potassium-preserving treatment, because the consequences of hyperkalemia are more serious than those of hypokalemia, which can lead to rapid death of the patient, so they must be taken seriously at this time. If potassium-protective diuretics are used for a long time, it is recommended to stop using them for a period of time and switch to other antihypertensive drugs for treatment, which can effectively improve the electrolyte balance in the body and thus prevent the occurrence of hyperkalemia. If the patient is found to have hyperkalemia, it is necessary to use potassium-eliminating diuretics to lower the blood pressure, which can effectively eliminate potassium ions from the body, so that the electrolyte balance can be improved and hyperkalemia can be effectively improved.