Dizziness after taking medications to activate blood circulation may be caused by a drop in blood pressure due to the dilation of blood vessels caused by the medication. A severe drop in blood pressure may cause hypoperfusion in the brain and predispose to inadequate blood supply to the brain, including inadequate blood supply to the cerebellar brainstem and inadequate blood supply to the brain. Insufficient blood supply to the cerebellar brainstem of the cerebellum makes patients mainly manifest dizziness, balance disorders and ataxia, but also difficulty swallowing, choking on water, and in some patients, explosive speech. Insufficient blood supply to the brain is the patient may experience blackness in front of the eyes, and may also experience episodes of sensory impairment and motor impairment in the lateral limbs. Some patients can also present with speech dysfunction, which is usually seen mainly in left-sided lesions and includes aphasia and dysarthria. If the patient’s blood pressure is severely low, he or she should be treated with volume expansion. Common medications include 706 plasma, and intravenous saline or sugar saline may also be administered.