The most commonly used is nifedipine tablets, which have a rapid onset of action, taking only 3-15min, with a short maintenance effect, lasting about 5 hours. There are also short-acting antihypertensive drugs such as captopril, which takes 15-30min to start, and captopril has a slightly longer maintenance time of about 6 hours, as well as diltiazem hydrochloride tablets and verapamil. Although short-acting antihypertensive drugs have a rapid onset of action, the maintenance effect time is not long. If you want to take short-acting antihypertensive drugs to lower blood pressure, you need to take them at least three times a day according to the duration, otherwise you will not be able to achieve an effective antihypertensive effect. For hypertensive patients will be poor compliance, so short-acting antihypertensive drugs are only used as a rapid antihypertensive drugs when blood pressure is significantly higher than normal, to be normal blood pressure, according to the situation need to give medium and long-acting antihypertensive drugs to lower blood pressure smoothly.