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n.
a monoclonal antibody used to treat some types of non-Hodgkin's lymphoma that have not responded to standard chemotherapy. It is administered by intravenous infusion; side-effects include nausea, vomiting, and allergic reactions. Trade name: Mabthera.
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ri·tux·i·mab (rĭ-tukґsĭ-mab) a chimeric murine/human monoclonal antibody that binds the CD 20 antigen; used as an antineoplastic in the treatment of CD20-positive, B-cell non-Hodgkin lymphoma; administered intravenously.Medical dictionary. 2011.