For patients with high blood pressure, the blood pressure can be effectively lowered by injections and infusions. For those patients with intractable hypertension or malignant hypertension, often the blood pressure is above 200 mmHg systolic and above 120 mmHg diastolic in a short period of time, while the patient may have severe headache, head swelling and other uncomfortable reactions. Some patients with malignant hypertension combined with cerebral hemorrhage, or aortic coarctation and other serious life-threatening diseases, this time need to use intravenous fluids, the use of vasodilator drugs, so that the patient’s blood pressure has a significant drop in a relatively short period of time, down to a safe range, to avoid further aggravation of cerebral hemorrhage, to avoid the rupture of the aortic coarctation caused by sudden death, etc., intravenous blood pressure drugs such as Uraldial The blood pressure drugs used intravenously are uradil, nitroglycerin, sodium nitroprusside, etc.