Dizziness and drifting feet when walking should be considered to be caused by deep sensory disturbance. If the patient is an elderly person, he or she must be alert to acute cerebrovascular disease, and dizziness and drifting feet should be considered to be caused by ischemia of the posterior circulation or infarction of the posterior circulation. Because the balance receptors, vestibular nuclei, are in the posterior circulation, when the patient has posterior circulation ischemia or infarction in the cerebellar brainstem, it will lead to dizziness and unstable walking symptoms. Patients must consult a hospital promptly and have a neurologist conduct a physical examination to clarify the cause before treatment. In this case, oral long-acting antihypertensive drugs can be administered symptomatically to lower the blood pressure to relieve these symptoms.