Samsung Bioepis Co. Ltd., of Incheon, South Korea, gained U.S. FDA approval of Epysqli (eculizumab-aagh) as the second biosimilar product to Alexion Pharmaceuticals Inc.’s Soliris (eculizumab) to treat two rare diseases. The regulatory clearance July 22 grants use of Epysqli to treat paroxysmal nocturnal hemoglobinuria and atypical hemolytic uremic syndrome – two rare hematologic- and kidney-related disorders known to affect about 50,000 and 5,000 patients in the U.S., respectively.