Long-term effects of an oral iron chelator, deferasirox, in hemodialysis patients with iron overload

Abstract

Background/PurposeRetention of excess iron from transfused blood in organs in patients with renal anemia may lead to various systemic complications. Iron chelating agents such as deferasirox (DFX) decrease such iron overload. This study assessed the efficacy, safety, and tolerability of DFX in hemodialysis (HD) patients with iron overload.MethodsWe retrospectively (February 2008 to June 2012) reviewed data for eight HD patients with end-stage renal disease who were prescribed DFX (15 mg/kg/day) for transfusion-induced iron overload. Baseline and post-treatment levels of hematocrit, ferritin, erythropoietin (EPO), transferrin saturation (TSAT), total and unsaturated iron-binding capacity (TIBC and UIBC, respectively), and blood transfusion volumes were measured. Treatment efficacy was evaluated by observing changes in ferritin and TSAT during the study period; monthly EPO doses and blood transfusions were also recorded. Safety was evaluated in the form of adverse events.ResultsDFX administration caused statistically significant reductions in TSAT (68.2–49.2%; P = 0.036) and ferritin (3133.1–1215.6 ng/ml; P = 0.017). Significant post-treatment increases in UIBC (63.3–196.6 µg/dl; P = 0.018) and TIBC (210.0–422.4 µg/dl; P = 0.012) were also observed. While there were no significant differences in hematocrit values or EPO requirements after treatment, significant reductions in average monthly transfusion volumes (P = 0.026) were recorded. DFX was generally well tolerated; common adverse effects included nausea, vomiting, diarrhea, and abdominal pain.ConclusionDFX significantly improved iron metabolism in HD patients with iron overload and had an acceptable frequency of adverse effects.