Objective: To observe the effect of Bitter Apricot Seed

Platycodon Root

and their compatibility for relieving cough and expelling phlegm. Method: Cough model was made by ammonia stimulation. Cough latency and cough times of the mice were recorded respectively. A mouse model of phenol red excretion was used to evalute the phlegm expelling. Result: Bitter Apricot Seed

Platycodon Root

and their compatibility all significantly reduced the cough times in the mice. Furthermore

the cough times of the compatibility group were significantly less than that of bitter apricot seed group and platycodon root group in the same dose. The phenol red excretion quantity of all groups of Bitter Apricot Seed

Platycodon Root

and their compatibility were significantly increased than that of control group. And there were no significant differences between the groups of Bitter Apricot Seed

Platycodon Root

and their compatibility. Conclusion: Both Bitter Apricot Seed

Platycodon Root and their compatibility have the evident effect of relieving cough and expelling phlegm. Furthermore

the compatibility of Bitter Apricot Seed and Platycodon Root increased the efficacy of relieving cough. However

the efficacy for expelling phlegm did not increased by their compatibility in the experiment. Whether the compatibility of Bitter Apricot Seed and Platycodon Root can increase the efficacy of expelling phlegm should be answered in further studies.