Efient, known generically as prasugrel, is a prescription medication primarily used to prevent blood clots in patients with acute coronary syndrome who are undergoing a procedure called angioplasty. Angioplasty is a common treatment for the arteries of the heart that have been narrowed or blocked. As a member of the thienopyridine class of adenosine diphosphate (ADP) receptor inhibitors, Efient works by inhibiting platelet activation and aggregation, which are critical steps in the formation of blood clots. By doing so, it helps to maintain open blood vessels and reduce the risk of heart attacks or strokes in patients with heart conditions. However, it is important to note that Efient can increase the risk of bleeding, and its use must be carefully monitored by a healthcare provider.