Introduction: Chagas’ disease (DC) is a parasite caused by the infectious agent Trypanosoma cruzi. In Brazil, the specific treatment of CD is performed with Benzonidazole (Bz), which due to its toxicity, can lead to the appearance of several adverse reactions to patients who use it. Therefore, there is a certain concern in evaluating the patient before starting the use of Bz, in order to verify possible hematol...