Lack of effect of ponsinomycin on the pharmacokinetics of nicoumalone enantiomers.
1990
Abstract
Pharmacokinetic interaction between ponsinomycin-nicoumalone was studied in six subjects who received an 8 mg oral dose of racemic nicoumalone alone and 4 days into an oral regimen of ponsinomycin 800 mg twice daily. The concentrations of R(+) and S(-)-nicoumalone in plasma were measured using a stereospecific h.p.l.c. assay. The disposition characteristics of nicoumalone enantiomers in the control phase of this study were similar to those reported previously with the exception of the data for one subject whose oral clearance for S(-)-nicoumalone was seven times lower than those in the other subjects. A statistically significant effect of ponsinomycin on the kinetics of R(+) and S(-)-nicoumalone was not demonstrated.
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