Celltrion Inc. is on a biosimilar roll with the U.S. FDA this month, having gained clearance of Stoboclo and Osenvelt as products referencing Amgen Inc.’s biologic, denosumab (Prolia, Xgeva), along with Omlyclo becoming the first and only interchangeable biosimilar to omalizumab (Xolair, Genentech Inc. and Novartis AG).