The correct time to take antihypertensive medication is usually half an hour after waking up in the morning and between 4 and 6 p.m.; however, the exact time depends on the physician’s advice. Normal human blood pressure has two peaks and one trough in a day; blood pressure starts to rise at 5:00 a.m., peaks at 6:00 a.m. and then tends to level off; then peaks at about 5:00 p.m., and blood pressure is relatively lower at night; so the correct time to take antihypertensive drugs is generally half an hour after waking up in the morning and about 5:00 p.m., in order to effectively control the stabilization of blood pressure. Therefore, when the blood pressure fluctuation is abnormal and loses the normal peak performance, i.e. clinical symptoms such as dizziness, chest tightness and discomfort or numbness of limbs, it is recommended to consult a doctor in time for diagnosis and treatment and take antihypertensive medication under the doctor’s guidance at the right time, do not buy and take antihypertensive medication privately and at will, to avoid delaying the condition.