Antifibrinolytics are medications that help prevent excessive bleeding by inhibiting the breakdown of fibrin, a protein essential for blood clot formation. They are commonly used in various medical situations, such as during surgery or in patients with bleeding disorders, to promote clot stability and reduce blood loss. These drugs work by blocking the action of enzymes like plasmin, which dissolve clots. Common antifibrinolytics include tranexamic acid and aminocaproic acid. Their use can be crucial in managing conditions such as hemophilia or during traumatic injuries, ensuring that patients maintain adequate blood levels and avoid complications from severe bleeding.