Streptokinase is an enzyme. It is also called as fibrinolysis. The name is given because it helps in breaking down the fibrin, the main component of blood clots. Hence, it is known as a clot buster. It is used as a drug in thrombolytic therapy to break down the unwanted blood clot or thrombus. Hence, this is used in the treatment of myocardial infarction, cerebrovascular thrombotic stroke, and pulmonary embolism.