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Allopurinol
Pronunciation
Definition 1
A drug that lowers high levels of uric acid (a byproduct of metabolism) in the blood caused by some cancer treatments. (NCI Dictionary)
Definition 2
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. (NCI Thesaurus)
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