Long-term therapy with deferiprone.

Data from several trials have provided direct and supportive evidence for the efficacy of deferiprone in the treatment of iron overload in thalassemia major. Deferiprone has been shown to induce sustained decreases in body iron to concentrations associated with survival free from the complications of iron overload in deferoxamine (DFO)-treated patients. Despite this evidence of efficacy, the risk of agranulocytosis mandates a careful evaluation in patients willing and able to use DFO. The incidence of agranulocytosis associated with deferiprone is under study in a prospective multicenter trial in Canada, Italy and the United States, under corporate sponsorship (Apotex Research, Canada). The results of this study should determine the risk associated with the use of this agent, and may provide the data required for an FDA decision regarding licensing of this agent for the treatment of iron overload, a goal supported by investigators worldwide.