Reduced-dose rasburicase (recombinant xanthine oxidase) in adult cancer patients with hyperuricemia

S. Trifilio, L. Gordon, S. Singhal, M. Tallman, A. Evens, K. Rashid, M. Fishman, K. Masino, J. Pi, J. Mehta*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

69 Scopus citations


Recombinant urate oxidase (rasburicase) lowers uric acid levels rapidly to very low levels at the labeled dose of 0.15-0.2 mg/kg daily for 5 days. Our past experience showed that a lower dose (3 mg) lowered uric acid levels sufficiently in most patients. A retrospective review was conducted to determine the effect of a fixed 3 mg dose of rasburicase in 43 adult patients with cancer undergoing hematopoietic stem cell transplantation or receiving chemotherapy who had elevated or rising uric acid levels (6.4-16.8 mg/dl; median 9.6). Six patients received a second dose of rasburicase (3 mg in four patients and 1.5 mg in two patients) 24h later. Patients received allopurinol, adequate hydration, as well as other supportive therapy as required. Uric acid levels declined by 6-95% (median 43%) within the first 24h after rasburicase administration, and levels at 48h were 9-91% (median 65%) lower than the baseline levels. Serum creatinine changed by ≤10% in 21 patients, increased by >10% in four patients and decreased by >10% in 18 patients. No significant renal dysfunction developed in any of the patients. We conclude that rasburicase is effective in lowering uric acid levels at a fixed dose of 3 mg, which is much lower than the recommended dose.

Original languageEnglish (US)
Pages (from-to)997-1001
Number of pages5
JournalBone Marrow Transplantation
Issue number11
StatePublished - Jun 2006


  • Hyperuricemia
  • Rasburicase
  • Tumor lysis syndrome
  • Uric acid

ASJC Scopus subject areas

  • Hematology
  • Transplantation


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