Frequent dizziness and discomfort after taking antihypertensive drugs can be divided into the following cases: 1. If the blood pressure is lowered to the normal range and the patient still experiences dizziness and discomfort, it is necessary to consider that the patient’s original blood pressure is relatively high. The body has adapted to the state of high blood pressure, blood pressure suddenly lowered to normal after but can not tolerate. In other words, the patient will experience dizziness and discomfort when the relative hypoperfusion occurs after the sudden normalization of the high perfusion level. After a period of taking the drug, the patient’s body will gradually adapt to it and improve. In addition, it is possible that the dizziness is caused by the side effects of the drug, for such patients should change the variety of drugs and observe whether the patient’s symptoms can be improved; 2, patients taking antihypertensive drugs, blood pressure drops too low and causes hypotension, which causes cerebral underperfusion and causes dizziness, may be more common in the elderly. Some patients do not measure their blood pressure after taking the medication, but their blood pressure is low, so they will experience dizziness and discomfort. In this case, patients should visit the hospital and reduce the variety and type of antihypertensive drugs they take, and at the same time try to raise their blood pressure to a relatively suitable level to ensure normal supply of cerebral perfusion.