Cerebral atherosclerosis insufficient blood supply can take aspirin, resuvastatin, betahistine and other drugs. 1. Aspirin belongs to the antiplatelet drugs, can reduce platelet aggregation, reduce blood viscosity, prevent the progress of atherosclerosis, increase the blood supply of the brain; the adverse effects of the drug is mainly for the bleeding, allergic to the drug components, active bleeding, active ulcers, hemophilia, aspirin-related asthma is prohibited for patients. 2. Rosuvastatin belongs to the statin class of drugs, can reduce blood lipids to stabilize plaque, is the basic treatment of atherosclerosis of the drug; Rosuvastatin adverse reactions include nausea, vomiting, gastrointestinal discomfort, transaminase elevation, arthralgia, etc., allergic to the drug components, unexplained elevation of liver enzymes, severe hepatic impairment of the patient is prohibited? 3. Betahistine has the effect of expanding cerebral blood vessels, increasing the blood supply to the brain, can be used to treat dizziness caused by insufficient blood supply to the cerebral arteries; adverse reactions to the drug are head swelling, drowsiness, loss of appetite, itching of the skin, etc., allergic to the components of the drug, active ulcers, pheochromocytomas are prohibited in patients with allergies. In the treatment of medication, must follow the doctor’s instructions, rational application of drugs, do not use drugs arbitrarily, to avoid causing serious adverse reactions.