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  • Title: Evaluation of a low, weight-based dose of rasburicase in adult patients for the treatment or prophylaxis of tumor lysis syndrome.
    Author: Knoebel RW, Lo M, Crank CW.
    Journal: J Oncol Pharm Pract; 2011 Sep; 17(3):147-54. PubMed ID: 20332174.
    Abstract:
    PURPOSE: Rasburicase is a recombinant urate oxidase enzyme generally reserved for the treatment or prevention of hyperuricemia in patients that are at high risk of developing tumor lysis syndrome (TLS). The primary objective of this study is to evaluate and characterize the outcomes of patients receiving low dose rasburicase for treatment or prophylaxis of hyperuricemia secondary to TLS. PATIENTS/METHODS: A retrospective chart review between April 1, 2007 and September 31, 2008 was completed. All adult patients who received a dose of 0.05mg/kg with either a leukemia or lymphoma diagnosis in addition to at least two TLS risk factors: WBC ≥ 50 × 109/L, LDH 2 × ULN, uric acid ≥ 8 mg/dl, SCr ≥ 1.5 mg/dl were included. Forty-eight patients received rasburicase for prophylaxis (n = 18) or treatment (n = 30) of TLS. RESULTS: Forty patients achieved and maintained a uric acid less than 8 mg/dL, 24 h after receipt of a single dose of rasburicase without the requirement for renal replacement therapy. A statistically significant decrease in UA was achieved in all patients when compared to baseline (p < 0.001). Cost analysis revealed a $ 1.96 million (96%) direct cost savings for the 48 patients in this study when compared to the cost of manufacturer's dosing recommendation. CONCLUSIONS: Low dose rasburicase was efficacious and cost effective for both prophylaxis and treatment of TLS. Administration of a single dose of 0.05mg/kg of rasburicase was sufficient in correcting uric acid levels for most patients.
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