Black Box Warning
WARNING: LIFE-THREATENING HEMATOLOGIC ADVERSE REACTIONS. Ticlopidine can cause life-threatening hematologic adverse reactions, including neutropenia/agranulocytosis, thrombotic thrombocytopenic purpura (TTP), and aplastic anemia. Neutropenia/agranulocytosis typically occurs within the first 3 months, and TTP usually develops within the first few weeks of therapy. Aplastic anemia may occur within the first 3 months. Monitor patients for hematologic adverse reactions and obtain complete blood counts with white blood cell differential and platelet counts every 2 weeks for the first 3 months of therapy. Discontinue ticlopidine immediately if any hematologic abnormality is identified.
What this means:A black box warning is the FDA's strongest required safety notice. It signals a serious or life-threatening risk. Patients should review this with their prescriber before starting, continuing, or switching Ticlopidine.