Rituximab is used in the treatment of non-Hodgkin lymphoma, rheumatoid arthritis, chronic lymphocytic leukemia, granulomatosis with polyangiitis, and microscopic polyangiitis.
How Rituximab works Rituximab is a monoclonal antibody that targets the unwanted activity of immune cells (B cells) in rheumatoid arthritis and certain types of cancers.
Common side effects of Rituximab include headache, weakness, infection, chills, decreased white blood cell count (neutrophils), fever, infusion site reaction, lymphopenia, abdominal pain, and back pain.