Get our free Bexxar coupon and be eligible to receive a discount. You can reduce your Bexxar cost by up to 75% with our free Bexxar discount card. Bring it to a participating pharmacy near you to save on your prescription medication.Bexxar is a monoclonal antibody that is linked with radioactive iodine I-131. Monoclonal antibodies are made to target and destroy only certain cells in the body. This may help to protect healthy cells from damage. Bexxar is used to treat certain forms of non-Hodgkin's lymphoma. It is usually given after other medications have been tried without successful treatment. Bexxar may also be used for purposes not listed in this medication guide.