Inadequate blood supply to the brain can cause cerebral infarction in severe cases. Chronic cerebral insufficiency can cause ischemic-hypoxic encephalopathy, which can be characterized by memory loss, poor concentration, and possibly even dementia. Most of the cerebral insufficiency occurs in middle-aged and elderly people, for example, patients are often combined with hyperlipidemia, hyperglycemia, homocysteinemia, and patients may have cerebral atherosclerosis. Treatment is mainly given to improve blood circulation, soften blood vessels and control risk factors, commonly used drugs include Cipro, Ginkgo biloba drops, vitamin E. Patients with hypertension can be treated with oral amlodipine and amlodipine benzoate to lower blood pressure. For patients with diabetes mellitus, metformin is applied orally, and also oral Repaglinide can be taken at the same time, and insulin can be applied if necessary. For patients with hyperlipidemia, lipid-lowering therapy is mainly given. The commonly used drugs are simvastatin, resulvastatin and atorvastatin, and oral aspirin can be used to antiplatelet aggregation if necessary.