Normally the first time you take antihypertensive medication, your blood pressure will start to drop in about 1-2 hours. If you want to reduce blood pressure rapidly, intravenous administration of antihypertensive drugs is effective, but the risk is also very high, may cause some dangerous consequences, and even the possibility of death, so the static order of drugs should also be cautious. The basic principle of our normal choice of antihypertensive drugs is generally to start with a small dose and then gradually increase the dose, giving priority to long-acting preparations and giving long-acting drugs once a day as much as possible, so as to effectively control the blood pressure at night and the morning peak, and more effectively prevent cardiovascular and cerebrovascular complications. If a short- or medium-acting preparation is given, the drug needs to be administered 2-3 times a day to achieve smooth blood pressure control. If blood pressure control is not ideal at low doses of a single drug, a combination of drugs is also chosen to achieve the goal of lowering blood pressure.