Maball 500mg Injection is a targeted biologic medication containing Rituximab, primarily used to treat Non-Hodgkin Lymphoma (NHL), Chronic Lymphocytic Leukemia (CLL), and severe Rheumatoid Arthritis (RA). It works as a monoclonal antibody that binds to CD20 antigens on specific white blood cells (B-cells) to reduce harmful immune responses or destroy cancer cells.