It is not accurate to say that a thrombolytic injection can last for several years. Thrombolytic drugs have the effect of unblocking blocked blood vessels in case of acute vascular blockage, and the commonly used drug is alteplase. For example, in acute cerebral infarction, if in the time window of intravenous thrombolysis, and there is no contraindication, can be carried out atipase intravenous thrombolysis treatment. The main component of alteplase is glycoprotein, which can bind to fibrin through its lysine residues and activate the fibrin-bound fibrinogen to convert to fibrinolytic enzyme, which can dissolve the thrombus. Alteplase is rapidly cleared from the circulation after intravenous administration and is mainly metabolized by the liver, and is not known to last for several years. When acute vascular blockage disease occurs, it is necessary to consult a doctor in time and standardize the treatment to avoid delaying the disease.