Thrombolytics are medications used to dissolve blood clots that can block blood vessels, leading to conditions like heart attacks or strokes. They work by breaking down fibrin, a protein that helps form clots, allowing blood to flow more freely and restoring circulation. These drugs are typically administered in emergency situations, often through an intravenous line. Common thrombolytics include alteplase and tenecteplase. While effective, they carry risks, such as bleeding complications, so their use is carefully considered by healthcare professionals based on the patient's condition and timing of treatment.