Ristova 500 mg (Rituximab Injection) is a prescription biologic medicine used to treat a range of blood cancers (such as non‑Hodgkin lymphoma and chronic lymphocytic leukemia) and certain autoimmune diseases (including rheumatoid arthritis and vasculitis). Rituximab is a monoclonal antibody that attaches to CD20 proteins on specific immune cells to help slow disease progression and reduce symptoms. Ristova is administered via intravenous infusion by healthcare professionals and requires careful monitoring for infusion reactions and infection risks. Available in Pakistan through oncology pharmacies, pricing varies with supplier and brand.