Insufficient blood supply to the vertebral basilar artery has now changed its official medical name to posterior circulation ischemia, and the following types of drugs are commonly used: 1. aspirin or clopidogrel, whose main function is to prevent platelet aggregation and thrombosis, and which can increase blood viscosity and play a role in improving circulation. 2. beraprost sodium or vincristine or vincristine, which are drugs that mainly dilate blood vessels and can directly increase blood supply to the brain. 3. The main function of these drugs is to improve blood supply and oxygen supply to the brain, improve mitochondrial energy supply, nourish brain cells, and improve brain function. 4. Chinese patent medicines, such as Tiandan Tongluo capsule, Brain Heart capsule, and Anti-thrombotic enteric capsule, are mainly used to activate blood circulation and remove blood stasis.