MedIndia | Cancer Drug May Also Treat Chronic Fatigue Syndrome WebMD The drug, rituximab (Rituxan), works by depleting immune cells called B-cells. It is FDA approved to treat non-Hodgkin's lymphoma, chronic lymphocytic leukemia, rheumatoid arthritis, and two kinds of vasculitis. For the study, researchers recruited 30 ... Rituximab trial remissions suggest CFS is an autoimmune illness - for subset ... Rituximab proven to treat ME/CFS Possible cause found for Chronic Fatigue Syndrome |