#antimetabolite  an antineoplastic drug that inhibits the utilization of a metabolite
  supertype:  #antineoplastic_drug__antineoplastic__cancer_drug  any of several drugs that control or kill neoplastic cells; used in chemotherapy to kill cancer cells; all have unpleasant side effects that may include nausea and vomiting and hair loss and suppression of bone marrow function
  subtype:  #fluorouracil  an antimetabolite used to treat certain cancers
  subtype:  #mercaptopurine__Purinethol  a drug (trade name Purinethol) that interferes with the metabolism of purine and is used to treat acute lymphocytic leukemia
  subtype:  #methotrexate_sodium__methotrexate__amethopterin  toxic antimetabolite that limits cellular reproduction by acting as an antagonist to folic acid; used to treat certain cancers and psoriasis and rheumatoid arthritis

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