E van der Kleijn

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A high performance liquid chromatography method for the determination of sulphamethoxazole and its metabolite N4-acetylsulphamethoxazole is described. The renal excretion rate and cumulative renal excretion of sulphamethoxazole is markedly influenced by urinary pH. With constant urinary pH, the renal excretion rate and the renal clearance of(More)
Baclofen is a centrally acting muscle relaxant marketed as the racemate. Since only the (-)-(R)-enantiomer is pharmacologically active, the pharmacokinetics of rac-baclofen and its enantiomers were studied individually in the same group of dogs to determine if there was any stereospecificity in the drug's kinetics after a single intravenous dose.(More)
In 14 patients with acute myeloid leukemia (AML) the plasma concentration of cytosine arabinoside (Ara-C) was determined at the start of the first course of treatment at various intervals after a bolus injection. In 10 patients plasma concentration/time data were fitted to a biexponential equation and pharmacokinetic parameters were estimated from the(More)
The pharmacokinetics of sulphamethizole, sulphamethoxazole, sulphadiazine, sulphapyridine and sulphadimidine have been studied in man. Renal clearance values of the metabolite N4-acetylsulphonamide are 6 to 20 times higher than those of the corresponding parent compound. The renal clearance of sulphonamides is dependent on the urine flow.(More)
To study the body distribution of 6-mercaptopurine (6MP), [8-14C]6MP was given by infusion to 2 marmoset monkeys at a dose rate of 5 mg/kg body weight/h for 1 and 4 h, respectively. Both experimental animals were sacrificed 2 h after the end of the drug infusion and instantly frozen at -70 degrees C. Whole-body sagittal sections were made later. Blood(More)
A reversed-phase high-performance liquid chromatographic method is described for the determination of seven anthracycline analogues and their hydroxy metabolites. The method is suitable for analysis of 30 plasma samples a day. The detection limit is 0.5 ng/ml for all compounds. Examples of the pharmacokinetics of adriamycin and carminomycin in man are shown.
Chromatographic conditions for the determination of 5-methyltetrahydrofolic acid in plasma and spinal fluid are described, involving simple pretreatment of the sample. Electrochemical detection was used. The linear range of the method is more than 10(3). Recovery from plasma and spinal fluid is 100%, and the detection limit of the method is 2.10(-9) M,(More)