Patients with dizziness and brain swelling after taking antihypertensive drugs: First, consider that it may be caused by improper use of medication causing lower blood pressure, pay attention to the measurement of blood pressure. If it is caused by low blood pressure, it is recommended that the patient lie down and reduce activities, while drinking more water, especially fruit juice and soy milk is more suitable. The second aspect may also be related to irregular medication, if the patient’s medication situation is not good, a meal is easy to eat a meal not to eat the instability of blood drug concentration, can also cause dizziness, brain swelling. The third aspect is that it may be related to the type of antihypertensive drugs, such as calcium antagonists and nifedipine, which can cause vasodilatation in the head, dizziness, brain swelling, and possibly increased heart rate.