Any side effects from rituxan (rituximab) therapy?

Mostly infusion rxns: Rituxan is given intravenously slowly at first to look for common immediate reactions like chills, fever, shakes, itching, hives, headache all of which could be prevented or lessened by giving premedications like Benadryl (diphenhydramine) and steroids. Reactivation of hepatitis b, lowering resistance to infections, rapid destruction of tumor cells causing i'll effects to organs (tumor lysis) can also occur.