Overview Extension Study of Eculizumab in Patients With Transfusion Dependent Paroxysmal Nocturnal Hemoglobinuria (PNH) Status: Completed Trial end date: 2008-10-01 Target enrollment: Participant gender: Summary The purpose of this study is to evaluate the long-term safety of eculizumab in patients with transfusion dependent hemolytic PNH. Phase: Phase 3 Details Lead Sponsor: Alexion PharmaceuticalsTreatments: Eculizumab