Metabolic Pharmacokinetics in Rats: Differences between Pure Amygdalin and Amygdalin in a Decoction of Peach Seeds

The pharmacokinetics of prunasin after oral administration of amygdalin or a decoction of peach seeds was determined and compared in rats. A column was used for separation at a column temperature of . The mobile phase consisted of 20% aqueous acetonitrile, and the flow rate was 0.5 mL/min. After oral administration of a decoction of peach seeds, prunasin was absorbed rapidly, reaching a maximum plasma concentration () of 62.1 mg/L within 45 min. After oral administration of amygdalin, the absorption of prunasin was delayed. The of prunasin was 42.9 mg/L and was reached at 60 min. Values for the pharmacokinetic parameters of prunasin, including , , AUC, , CL/F, and V1/F, were significantly different for the oral administration of amygdalin compared with that of a decoction of peach seeds.