Insufficient blood supply to the brain can take betahistine mesylate tablets, which is a drug that softens blood vessels and improves blood circulation. Insufficient cerebral blood supply is due to various causes of cerebral blood circulation disorders, which can lead to ischemic and hypoxic changes in the brain. Patients can have various signs and symptoms, which can manifest as blackness in front of the eyes, sensory or motor dysfunction of the limbs, as well as speech dysfunction, dizziness and balance disorders. Severe cerebral insufficiency of blood supply may cause cerebral infarction. Patients with chronic cerebral insufficiency of blood supply can develop ischemic and hypoxic encephalopathy, and patients can also develop memory loss and inattention, which should be promptly regulated clinically, mainly by improving blood circulation and activating blood stasis treatment. It occurs mostly in middle-aged and elderly people, and most patients have hyperlipidemia, diabetes mellitus and hypertension, and the cause should be treated at the same time.