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  • Title: Phase I clinical investigation of fludarabine phosphate by a loading-dose and continuous-infusion schedule.
    Author: Leiby JM, Grever MR, Staubus AE, Neidhart JA, Malspeis L.
    Journal: J Natl Cancer Inst; 1988 May 18; 80(6):447-9. PubMed ID: 2452888.
    Abstract:
    Fludarabine phosphate was studied in a phase I trial of a loading-dose/continuous-infusion schedule. The schedule was chosen to rapidly achieve and maintain concentrations that have been shown in vitro to achieve maximal inhibition of cell growth. The initial level was a loading dose of 20 mg/m2 followed by a 48-hour continuous iv (CIV) infusion of 30 mg/m2 every 24 hours. For the single-dose escalation, the loading dose was held constant while the CIV dose was increased to 45 mg/m2/24 hours for 48 hours. The dose-limiting toxicity was myelosuppression, especially leukopenia. No other significant toxicity was encountered. The maximum tolerated dose was 20 mg/m2 by iv push followed by a 48-hour CIV infusion of 30 mg/m2/24 hours for 48 hours. The recommended starting dose for phase II trials is 20 mg/m2 by iv push followed by a 48-hour CIV infusion of 30 mg/m2/24 hours. This dose level achieved the target plasma levels in the 2 patients studied.
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