@becsbuddy - I goodle this and this is what I found: Rituximab is used to treat certain types of cancer (such as non-Hodgkin's lymphoma, chronic lymphocytic leukemia). It works by slowing or stopping the growth of cancer cells. Some brands of rituximab are also used to treat rheumatoid arthritis and can decrease joint pain and swelling. (webmd).

I don't believe that this is for everyone. Where did you see this?