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[Interaction between ipriflavone and other drugs in metabolism in vitro]
1College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310031 China.
Objective:
To investigate the metabolism-based interaction between ipriflavone(IP) and other drugs in vitro.
Methods:
IP and propafenone or estradiol, or other drugs were co-incubated with rat liver microsome induced by beta-naphthoflavone. The concentrations of residual substrate in microsomal incubates were determined by HPLC.
Result:
The metabolism of propafenone (10 microg/ml) incubated with 2 microg/ml or 50 microg/ml IP was markedly inhibited compared with control group(P<0.01). While the metabolism of 10 microg/ml of estradiol incubated with 10 microg/ml and 100 microg/ml IP showed no marked inhibition. When IP (20 microg/ml) was incubated with 0.5 microg/ml propranolol, 0.5 microg/ml propafenone or 5.0 microg/ml estradiol respectively the metabolic activity of IP was markedly inhibited compared with control group (P<0.05 P<0.05 P<0.02 respectively).
Conclusion:
The results indicate that there is an interaction between ipriflavone and propafenone during in vitro metabolism, and there might also be clinical significance.
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