One night shift, a patient with right-sided limb weakness for 8 hours came to the emergency room with outpatient cranial CT suggestive of cerebral infarction. He was admitted to the hospital. Aggressive conventional conservative treatment was given after admission. The family was very anxious. One of the family members said, “Doctor, I heard that my neighbor suffered from cerebral infarction, and also had weakness of one side of the limb, couldn’t walk, and was cured by an injection in the hospital. Can my patient also be given a shot quickly? Is there really such a miracle drug that cures cerebral infarction with a single injection? The answer is yes, but not every patient with cerebral infarction can use it, nor does it mean that the cerebral infarction can definitely return to normal as long as the injection is given. The so-called shot is actually thrombolytic therapy for cerebral infarction. After the onset of cerebral infarction, it is necessary to go to the hospital as soon as possible, acute cerebral infarction, the onset of 4-6 hours, if there is no contraindication, it is possible to consider thrombolytic therapy, thrombolytic therapy for close to half of the patients can be recovered after the use of drugs. The patient mentioned above, because the onset of 8 hours before the hospital, missed the time of thrombolysis, so is not thrombolytic therapy.