The best drug for thrombolysis is alteplase, which is a thrombolytic drug mainly used for the treatment of acute cerebral infarction, acute heart infarction and deep vein thrombosis, and is required to be used within 4.5 hours for acute cerebral infarction. At present, there are mainly two specifications, one is 50mg and the other is 20mg. 50mg costs about 5,000-6,000 yuan, and it is required to be used not only within 4.5 hours, but also according to the weight of the patient. Generally 0.9mg per kilogram of body weight is used, so if a person weighs 60kg, about 50mg will be used, which is close to the amount of using one. It also has adverse reactions, the most common being bleeding, so patients should be monitored closely for bleeding reactions when using alteplase.