Antihypertensive drugs are divided into short-acting antihypertensive drugs and long-acting extended-release antihypertensive drugs, usually short-acting antihypertensive drugs after oral administration, most of the blood pressure can be reduced to normal values within 20-30 minutes, but it is recommended that patients take long-acting extended-release antihypertensive drugs orally, especially for elderly patients, oral administration of such drugs has a protective effect on the heart, cerebrovascular and kidney. Generally, the effect of oral antihypertensive drugs is more obvious after 3-5 days, and some patients can take up to seven days. The time of oral antihypertensive drugs and the number of oral doses per day should be adjusted at all times according to the patient’s blood pressure value, and patients are recommended to monitor their blood pressure at least three times a day to adjust their antihypertensive drugs.