Enfiera 100 Injection Enfiera 100 is an intravenous medicine containing rituximab, a targeted monoclonal antibody that acts on CD20-positive B cells. By attaching to these cells, it helps the immune system identify and eliminate abnormal or excessive B cells. It is used in the treatment of certain blood cancers and selected autoimmune conditions. The product is supplied as a 100 mg/10 mL single-use vial and must be diluted before intravenous infusion.