Efficacy and Safety of the New Intravenous Immunoglobulin IGIV 10% in Adults with Chronic Idiopathic Thrombocytopenic Purpura

Background: Intravenous immunoglobulin (IGIV) 10% is a newly developed 10% liquid immunoglobulin preparation for intravenous use where 3 dedicated virus reduction steps have been integrated into the manufacturing process. The efficacy and safety of this product were assessed in a prospective multicenter study in chronic ITP (idiopathic thrombocytopenic purpura) patients with platelet counts of =20 × 109/l. Patients and Methods: 23 adult ITP patients received the product at a total dose of 2 g/kg body weight administered over 2-5 days, and were followed for 4 weeks. Results: Of the 21 subjects included in the Per-Protocol Analysis Data Set, 15 responded successfully to treatment (71.4%). Eleven subjects in this group attained a platelet count increase to >100 × 109/l, and 8 reached a platelet count of >200 × 109/l. All 15 responders achieved a platelet count of =50 × 109/l by day 8, and 14 of them reached this level by day 5. The median duration of platelet response was 25 days, and the highest median platelet count in the responders was 182 × 109/l. A total of 81 infusions were administered to the 23 subjects in the Safety Analysis Data Set over the course of the study. There were 40 non-serious adverse events related to the use of the study drug - 35 mild, 3 moderate, and 2 severe. The most frequent related adverse events were headache and pyrexia. Conclusion: The results obtained in this study demonstrate that IGIV 10% is effective in the treatment of adult subjects with chronic ITP and indicate a good safety profile.