Which medication is classified as a thrombolytic?

Streptokinase is a thrombolytic medication that works by dissolving blood clots that have formed in blood vessels. Thrombolytics, also known as clot busters, are specifically designed to initiate the breakdown of fibrin in thrombi (the protein that is a primary component of blood clots), thereby restoring proper blood flow. This is particularly important in acute conditions such as myocardial infarction (heart attack) or ischemic stroke, where timely removal of a clot can significantly reduce damage to tissue and improve outcomes for the patient.

In contrast, the other medications listed serve different purposes. Clopidogrel is an antiplatelet agent that inhibits platelet aggregation but does not dissolve existing clots. Pentoxifylline is primarily used to improve blood flow in peripheral artery disease, while aminocaproic acid acts as an antifibrinolytic, which prevents the breakdown of clots rather than promoting their dissolution. This distinction in their mechanisms and uses highlights why streptokinase is classified specifically as a thrombolytic agent.