The role of thrombolytic therapy has evolved since the discovery of the first lytic agent, streptokinase, in 1931. Since then, there have been several agents developed for specific areas of clot and some that have been forcibly adapted for use outside of their intended scope. Traditional use for thrombolytic therapy included acute MI, PE, and DVT. We have adapted thrombolytic therapy to treat acute occlusions of peripheral bypass grafts, dialysis fistula and grafts, venous access devices, and nonhemorrhagic stroke. Even newer uses are for fibrin sheaths around chest tubes. This presentation reviewed the history of the development of thrombolytic therapy, its uses in the coronaries and peripheral vasculature, the various agents that can be used, and the events of the mid-1990s that changed the practice in IR, NIR, and cardiac cath labs across the nation. This presentation allowed the participants to understand the role of each agent in thrombolytic therapy for each indication. They were able to better understand the roles of streptokinase, urokinase, and alteplase in acute MI, PE, DVT, and stroke. The participants have an understanding of the patient care associated with each clinical indication based on evidence-based medicine. The participants were also able to understand the difference in dosing each medication and the financial cost of each medication when treating clots at standard doses for each agent used. In addition, the participants were aware of the clients who were not having their clot treated adequately.