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NCI Drug Dictionary

  

allopurinol 
A structural isomer of hypoxanthine. Allopurinol inhibits xanthine oxidase, an enzyme that converts oxypurines to uric acid. By blocking the production of uric acid, this agent decreases serum and urine concentrations of uric acid, thereby providing protection against uric acid-mediated end organ damage in conditions associated with excessive production of uric acid, i.e. the massive cell lysis associated with the treatment of some malignancies. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
US brand name:Zyloprim
Foreign brand name:Sigapurol
Abbreviations:4'-HPP
ALLO
Chemical structures:1,5-dihydro-4H-pyrazolo[3,4-d]pryimidin-4-one
1H-pyrazolo[3,4-d]pyrimidin-4-ol
4-hydroxypyrazolo[3,4-d]pyrimidine