Idebenone is a therapeutic drug for cerebrovascular diseases, which can be used mainly in chronic cerebrovascular diseases and brain dysfunction caused by traumatic brain injury, to improve subjective symptoms, language, anxiety, depression, memory loss, mental decline and other psycho-behavioral dysfunctions. Idebenone, as a drug for the improvement of cerebral metabolic psychiatric symptoms, activates the respiratory activity of brain mitochondria. It improves cerebral energy metabolism in cerebral ischemia, improves the utilization of glucose in the brain, increases the production of ATP energy in the brain, can inhibit the production of lipid peroxide in brain mitochondria, and can inhibit the peroxidation of mitochondrial membrane lipids, resulting in neurological dysfunction. Therefore, Idebenone is mainly used to treat cerebrovascular disease by improving brain metabolism and improving the situation of brain energy metabolism. In conclusion, Idebenone is a drug used to improve brain function and improve brain function impairment.