Drug Name Arzerra (Ofatumumab) Drug Class Anticancer Risk minimization type Direct Healthcare Professional Communication DHPC Safety communication Specialty (Theraputic area) Hematology Oncology Risk hepatitis B virus reactivation warning Safety update on a fatal infusion reaction reported in a patient with Chronic lymphocytic leukemia (Cll) who was treated with intravenous ofatumumab Risk of Progressive Multifocal Encephalopathy (PML) Following Ofatumumab Use safety communication Dear Healthcare provider letter DHPC