Some side effects are weakness, headache, cough, nausea, and a runny nose or other cold symptoms. Another side effect is the possibility of developing a rash. One serious side effect of Rituximab is hypersensitivity reaction which can be as serious as the patient going into anaphylactic shock. When it happens administration of the antibody is stopped the patient is given more Benadryl and steroids and it is restarted at a slower rate. In my case after the first round when I realized that I wouldn’t have a bad reaction to the antibody, the day which I got Rituximab was the best day it was my last day. I was not nauseous, and was asleep because of the