[The pathway of absorption and conveying of puerarin microemulsion-in-oil].

The best absorption location of puerarin microemulsion-in-oil in intestine parva of rat and pharmacokinetic characteristics, and the pathway of absorption and conveying of puerarin microemulsion were studied. In situ rat perfusion method was used to investigate the intestinal absorption of puerarin. Through the changes of drug concentration in blocked and unblocked lymphs, to determine the pathway of absorption and conveying. Puerarin microemulsion-in-oil can be absorbed in any part of intestine, and the K(a), P(app) of every part is ileum > duodenum > jejunum > colon, and the K(a), P(app) of ileum is significantly larger than that of others. The absorption rate of different concentrations is not significantly different (P > 0.05). The puerarin transited by gastrointestinal tract, about 36.8% is absorbed by the lymphatic channels to enter the systemic circulation and 63.2% is absorbed by the non-lymphatic channels. The best part of intestine to absorb puerarin microemulsion is ileum, and it is passive transport. The pathway of conveying is lymphoid and non-lymphoid transit.