In this study are reported 17 patients with G-6-PD deficiency. These subjects have been studied with double-blind trial between placebo and Paracetamol, looking for the possible hemolysis induced from drug in these children with G-6-PD deficiency. Hemolysis had been valued by various hematological parameters (Hb, erythrocyte count, reticulocytosis, bilirubinemia, haptoglobin, hemopexin, and survival of erythrocytes marked with Cr). The results (8 cases with placebo and 9 cases with paracetamol) demonstrate that paracetamol have not induced hemolysis in these G-6-PD deficient subjects.