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Phase I clinical investigation of fludarabine phosphate by a loading-dose and continuous-infusion schedule.

Leiby, J M; Grever, M R; Staubus, A E; Neidhart, J A; Malspeis, L.
J Natl Cancer Inst; 80(6): 447-9, 1988 May 18.
Artigo em Inglês | MEDLINE | ID: mdl-2452888
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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