The pharmacokinetics of YH439 and its metabolites were investigated af
ter oral administration of YH439 to rats to investigate the food effec
t. After oral administration of YH439, its metabolites, M4 and M5 were
detected in plasma. YH439 was not detected in the plasma for both fas
ted and fed rats for all doses studied. The pharmacokinetic parameters
of the metabolites were not affected by food at all doses studied. Th
e results of this study indicated that there are no significant food e
ffects on the pharmacokinetics of YH439 and its metabolites in rats.