To study the effect of Banxiaxiexin Tang and different conbinations on CYP450 in rat liver microsomes, from the point of liver metabolism, evaluate significance of Banxiaxiexin Tang compatibility. The rats were randomly divided into five groups: Banxiaxiexin Tang group, pungent-swelling group, bitter-descending group, sweet-invigorating group and control group, which were all given decoction by gavage. Using liver microsomes in vitro incubation method, probe substrate were incubated and their metabolites was detected by ultra-high performance liquid chromatography, then was calculated metabolic rate to reflect the drug-treated liver microsomes CYP2C6, CYP2E1, CYP3A1/2 activity. The results showed that comparing with the control group, both Banxiaxiexin Tang group and bitter-descending group showed inhibition on all enzyme subtype (P < 0.01), pungent-swelling group showed significant inhibition on CYP2C6, but no inhibition on CYP2E1 and CYP3A1/2; sweet-invigorating group showed inhibition on CYP2C6 and CYP2E1, but no inhibition on CYP3A1/2. Compared the inhibition on CYP with the three conbinations, bitter-descending group was significant higher than other groups. Banxiaxiexin Tang group showed inhibition on rat liver microsomes CYP450, and the activity maybe come from bitter-descending group.
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