The possible causes of dizziness and sleeplessness are as follows: 1, caused by ischemia and hypoxia of brain cells, commonly due to insufficient blood supply to the brain, due to the development of atherosclerosis, thickening of blood vessel walls and narrowing of blood vessel cavities, so that the cerebral blood flow through will be reduced, causing the phenomenon of insufficient blood supply to the brain. 2, anemia, as the patient’s hemoglobin content decreases, the amount of oxygen carried by hemoglobin will naturally decrease, which will cause the state of lack of oxygen to the brain. 3, high blood viscosity, resulting in slowing down the blood flow, will appear the phenomenon of insufficient blood supply to the brain, such as hyperlipidemia. It is suggested that you can go for MRI of the head or cranial Doppler examination to clarify whether the dizziness is caused by cerebral atherosclerosis or not. If the diagnosis is confirmed, you can take Ginkgo biloba capsules and compound salvia tablets. As long as the blood supply to the brain is adequate, there will be no dizziness and the feeling of drowsiness will be significantly improved.