apolizumab apolizumab apolizumab is a humanized monoclonal antibody intended for use in hematologic cancers. development was abandoned in 2005, because of toxic effects and lack of efficacy in humans. the observed dose limiting toxic effects were aseptic meningitis and hemolytic uremia. apolizumabmonoclonal antibodytypewhole antibodysourcehumanized (from mouse)targethla-dr betaclinical dataatc codenoneidentifierscas number267227-08-7 nchemspidernoneuniig88kcp51rekeggd02967 y ny (what is this?) (verify)