As long as the patient is primary hypertension, even if the blood pressure is normal, should continue to take antihypertensive drugs, blood pressure is normal, and then continue to eat antihypertensive drugs, generally will not lead to a further drop in blood pressure, that is, will not lead to the phenomenon of hypotension. Because the drug can gradually metabolize out of the body, take once antihypertensive drugs, if it is a long-acting preparation, generally can be maintained in the body about 24 hours of antihypertensive effect. So if you take the drug today and not tomorrow, there will be no more antihypertensive drugs in your body and your blood pressure will rise again accordingly. It is recommended that patients take regular oral antihypertensive drugs for a long time, so as to help control the stability of blood pressure, do not think that the blood pressure is stable immediately stop the drug, which will make the blood pressure fluctuate greatly, blood pressure is always high and low, but will be more likely to appear brain hemorrhage, brain infarction and other abnormalities.