The U.S. Food and Drug Administration (FDA) has approved Amgen‘s Riabni (rituximab-arrx), a biosimilar to Rituxan (rituximab), to treat adults with granulomatosis with polyangiitis (GPA) and microscopic polyangiitis (MPA), the two most common subtypes of ANCA-associated vasculitis. The FDA also approved Riabni to treat two blood cancers, non-Hodgkin’s lymphoma and chronic lymphocytic leukemia. The company plans to make the therapy available in the U.S. before the close of January. Riabni is now the third biosimilar to Rituxan to be approved in the U.S.…

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