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Title: The impact of drug administration sequence and pharmacokinetic interaction in a phase I study of the combination of docetaxel and gemcitabine in patients with advanced solid tumors
Authors: Dumez, Herlinde ×
Louwerens, M
Pawinsky, A
Planting, A S Th
de Jonge, M J A
Van Oosterom, A T
Highley, M
Guetens, Gunther
Mantel, M
De Boeck, Geert
de Bruijn, Ernst
Verweij, J #
Issue Date: Jul-2002
Series Title: Anti-cancer drugs vol:13 issue:6 pages:583-93
Abstract: Our objective was to determine the maximum tolerated dose (MTD) of two administration sequences of docetaxel and gemcitabine in cancer patients, and to describe the pharmacokinetics of both drugs. Patients were treated in a 4-weekly schedule at two dose levels: gemcitabine 800 mg/m2 on days 1, 8 and 15, and docetaxel 85 or 100 mg/m2 on day 15 (levels I and II). The protocol was amended to a 3-weekly schedule, testing gemcitabine 800 or 1000 mg/m2 on days 1 and 8, with docetaxel 85 mg/m2 on day 8 given initially (dose levels IIIa and IV). At the recommended dose, an extra cohort of patients initially received gemcitabine (dose level IIIb). Eleven patients were treated with the 4-week schedule; 29% of cycles were delayed predominantly because of hematological toxicity. Four patients developed dose-limiting toxicities (DLTs), predominantly hematological. In the 3-week schedule, 14 patients were treated. At level IV, three of four patients developed DLTs, defining the MTD. With the reverse sequence, three patients received a total of 10 cycles. Overall, nine partial remissions were observed. We conclude the recommended dose for phase II studies is gemcitabine 800 mg/m2 on days 1 and 8, combined with docetaxel 85 mg/m2 on day 8, on a 3-weekly schedule. Gemcitabine distribution is significantly altered upon docetaxel administration.
ISSN: 0959-4973
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Laboratory of Experimental Oncology
Department of Oncology - miscellaneous
× corresponding author
# (joint) last author

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