Drugs that dilate cerebral blood vessels mainly include the following categories: 1. Calcium antagonists, commonly used are nimodipine, flunarizine, etc. Calcium antagonists are mainly used to dilate large arterial blood vessels in the brain. 2. Chinese patent medicines include vincristine, compound danshin drops, Chuanxiongzin, shuxin, sparing blood, triclopidine, lanchin, etc. These Chinese patent medicines can not only dilate cerebral blood vessels, but also have the effect of activating blood circulation and removing blood stasis. 3, Prostaglandins include prostaglandin, fasudil, beriberi sodium, etc. These drugs are mainly used to dilate small arteries and micro-arterial vessels, thus improving the blood flow in the microcirculation of the brain. These drugs are mainly used in patients with acute ischemic stroke, cerebral vasospasm and ischemic-hypoxic encephalopathy, and should be monitored for blood pressure, heart rate, and liver and kidney function.