In clinical cases of inadequate blood supply to the vertebral artery, the first step is to perform a detailed examination of the vertebral artery to discover the specific cause, to see if the problem is due to a narrowing or occlusion of the vertebral artery caused by atherosclerosis or due to external compression. If the cause is internal, balloon dilation and stent implantation can be performed to be able to improve the blood supply to the vertebral artery and make it adequate. Bypass surgery can also be performed to bring blood flow from the vertebral artery over the lesion and to the distal end, which can improve the circulation to the brain tissue. At the same time, drugs that dilate blood vessels and improve microcirculation should also be applied, such as anti-platelet aggregation drugs, including aspirin and hydroclopidogrel, statins, including atorvastatin, simvastatin and resuprastatin, which can inhibit the further development of atherosclerosis, and drugs that dilate blood vessels, including cilostazol and beraprost sodium.