If a patient needs to temporarily lower blood pressure, the primary cause of hypertension should be clarified, and the blood pressure can be well controlled by treating the primary cause, i.e., by means of treatment and treatment for the cause. Therefore, it is recommended that while using antihypertensive drugs, the cause of the primary cause of hypertension must be clarified first. For example, mannitol can be used, which can lower blood pressure and reduce intracranial pressure and dehydration. In addition, diuretics can also be applied, and diuretics can be used in small amounts for a short period of time to lower blood pressure clinically and effectively. If a cardiogenic disease requires blood pressure lowering, a small amount of sodium nitroprusside can also be applied under supervision, which also has a certain effect of temporarily lowering blood pressure.