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G Ehninger, U Schuler, U Renner, M Ehrsam, KP Zeller, J Blanz, R Storb and HJ Deeg
Medizinische Klinik I, Universitatsklinikum, Dresden, Germany.
In a canine model we investigated the toxicity and pharmacokinetics of a
water soluble busulfan preparation. Busulfan was dissolved in
dimethylsulfoxide (DMSO) and administered either orally or intravenously in
a single dose of 1 mg/kg. The application in either preparation was well
tolerated. In seven dogs, peak levels in the range of 730 ng/mL to 1,000
ng/mL were measured after intravenous injection with an area under curve
(AUC) of 75 ng.h/kg.mL to 146 ng.h/kg.mL. It was of note that even the oral
administration of the same busulfan preparation resulted in AUC values in
the same range as observed after parenteral application. The absorption
rate of busulfan tablets in our model was as unpredictable as documented in
clinical trials. On the basis of the present study, clinical trials using
busulfan dissolved in DMSO given either intravenously or orally appear
warranted. This approach should lead to predictable blood levels, reduced
toxicity, and increased efficacy of busulfan-containing regimens.
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| Copyright © 1995 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||