The drugs of choice for hypertensive emergencies are nitroglycerin, sodium nitroprusside, labetalol, and nicardipine. It is important to note that when applying sodium nitroprusside for treatment, blood pressure must be closely monitored. Sodium nitroprusside will have a more rapid effect if administered intravenously, and its effect is maintained for only about 3-5 minutes after stopping the injection. Therefore, patients can use sodium nitroprusside intravenously along with long-acting antihypertensive drugs for combined treatment, and the speed of sodium nitroprusside injection can be adjusted slowly. Nitroglycerin is relatively safe in application, but the antihypertensive effect is slightly worse than sodium nitroprusside. Patients with acute hypertension and acute cerebrovascular disease can use nicardipine. Patients with hypertensive emergencies during pregnancy or with renal insufficiency can be treated with labetalol.