Recombinant humanized monclonal antibody 5c8 April 12, 2017 Recombinant humanized monclonal antibody 5c8 Trade Name Orphan Indication Immune thrombocytopenic purpura USA Market Approval USA USA Designation Date 1998-02-03 00:00:00 Sponsor Biogen, Inc.;14 Cambridge Center;Cambridge, Massachusetts, 02142