How long before the physical examination to take antihypertensive drugs, should be combined with the type of antihypertensive drugs usually taken, such as taking captopril, it is recommended to take about 3-4 hours before the physical examination. As for long-acting antihypertensive drugs, the time of taking them does not affect the antihypertensive effect, and it is usually sufficient to wake up early in the morning to take them. Antihypertensive drugs can affect the hemodynamics of the body, which may affect the final true medical examination results. As for how long to take antihypertensive drugs before the physical examination, it depends on the onset of action of the antihypertensive drugs and the size of the effect of the drugs. If it is a short-acting antihypertensive drug, such as captopril, the effect is faster, generally within 2 hours, it is recommended to start taking antihypertensive drugs about 3-4 hours before the physical examination. For long-acting antihypertensive drugs, such as Irbesartan, etc., the onset of action is slower and usually does not affect the results of the physical examination. Therefore, long-acting antihypertensive drug preparations can be taken normally according to the usual use time. In addition, the usual time for patients to take antihypertensive drugs is related to the type of blood pressure, such as spoon type blood pressure, it is generally recommended to take antihypertensive drugs in the morning. For anti-spoon type hypertension, antihypertensive drugs should be taken at the evening peak.