Stroke is a battle against time. Whether the blood vessels in the brain are blocked (brain infarction) or burst (brain hemorrhage), blood should be supplied to the brain normally within a short period of time. The medical community explains that the golden time of stroke is 4.5 hours. This means that the problem can be solved only when the symptoms occur and arrive at the hospital within 4 hours and 30 minutes. The importance of preventive treatment has been increasing. As the results of stroke treatment have improved compared to the past, drug treatment to prevent the recurrence of patients with stroke once has become more important. Park Jong-kyu, a professor of neurology at Cheonan Hospital affiliated with Soonchun