Methotrexate-vindesine association in leukemia: Pharmacokinetic study
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Methotrexate (MTX) and vindesine (VDS) have both been found effective in the treatment of acute leukemia. With regard to their pharmacological effects at the cellular level they can reportedly interact. Administration of MTX at high dose levels has been suggested as both a curative and preventive treatment of blastic meningitis. The purpose of this work was to determine whether an injection of VDS leads to any change in MTX clearance and uptake in the cerebrospinal fluid (CSF).
The plasma pharmacokinetic and CSF influx of MTX and VDS were assayed after high dose systemic MTX with an intravenous bolus of VDS administered in the treatment of acute lymphoblastic leukemia. The MTX concentration was determined by enzymatic assay and VDS by radio immunoassay. No interrelation between these drugs was found.
MTX levels in the CSF were sufficient for therapeutic effectiveness but were not affected by intravenous VDS. Detectable amounts of VDS were observed in the CSF but were not altered by MTX.
Key wordsMethotrexate Vindesine Pharmacokinetic Acute lymphoblastic leukemia Cerebrospinal fluid
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