To analyze scientifically the polyprescription principle of Daekumeumja(對金飮子), which has been used for alcoholic damage, and Pyungwesan(平胃散), which has been used for indigestion, the transforming rate of hesperidin of these polyprescriptions to hesperetin was investigated. The transforming rate of the former was higher 3 times than that of the latter. The transforming rate of hesperidin of Aurantii nobilis Pericarpium was inhibited by Magnoliae Cortex, but was activated by Glycyrrhizae Radix. The activity of trypsin was inhibited by Glycyrrhizae Radix and Daekumeuja. However, Aurantii nobilis Pericarpium, Atractylodis Rhizoma, Magnoliae Cortex and Pyungwesan did not inhibited it. When human intestinal microflora were cultured with the media containing Daekumeumja, Pyungwesan and herbal medicines consisting of them, Aurantii nobilis Pericarpium and Magnoliae Cortex inhibited the activity of ${eta}$-glucosidase. These results suggests that the therapeutic effect of Daekumeumja may be better than that of Pyungwesan on alcoholic damage and the therapeutic effect of Pyungwesan may be better than that of Daekumeumja on indigestion, although these prescriptions are consisted of the same herbal medicines.