Ethanol extract and water extract from cotton root both could significantly decrease cough times, prolong incubation period of cough, increase phenol red output in trachea and inhibit ear swelling.

结果发现棉花根醇提物、水提物均能延长小鼠的咳嗽潜伏期，减少咳嗽次数，均能增加气管内的酚红排泌量，对二甲苯所致的耳肿胀均有显著的抑制作用。

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