1) Antimetabolite 2) Immune suppressant drug 3) Immunosuppressant 4) Immunosuppressive drug 5) Mercaptopurine 1) Mercaptopurine 
A drug used to treat acute lymphatic leukemia. It belongs to the family of drugs called antimetabolites. Also called mercaptopurine.
(pu´rēn-thol) trademark for a preparation of mercaptopurine, an antineoplastic agent and immunosuppressant.