The best time for thrombolysis is a few hours after onset.

The best time for thrombolysis of cerebral thrombosis is 3.5 hours after onset, but it can be extended to 6 hours according to the patient's condition. There is also a relationship with drugs. If urokinase thrombolysis is used, it can be extended to the current stage within 12 hours. If imported tissue plasmin is used, it is best to thrombolysis within 4.5-6 hours. If the time is prolonged, it increases the possibility of bleeding. There are many contraindications and indications for thrombolysis, which cannot be measured simply by time, but should be determined according to the specific conditions of the patient.