vapaliximab vapaliximab vapaliximab is a chimeric monoclonal antibody and an experimental immunosuppressive drug. development was discontinued by 2012. vapaliximabmonoclonal antibodytypewhole antibodysourcechimeric (mouse/human)targetvap-1clinical dataatc codenoneidentifierscas number336801-86-6 nchemspidernoneuniim1egr25lbb ny (what is this?) (verify)