Anagrelide A drug that is used to decrease the number of platelets in the blood in order to prevent blood clotting. Also See: Anthracycline Auditory AFP464 Abemaciclib Advance directive Acute myeloid leukemia with myelodysplasia-related changes Accelerated partial-breast irradiation Angiogenesis Inhibitor Acetyl-L-carnitine Amylase ALSO SEE: Vitamin B12