Abstract: Objection: To determine the change pattern of ephedrine and glyrihhzine acid in mahuang and gancao pair medicines and Maxingganshi decoction.

• 中文摘要: 目的：考察麻黄与甘草酸碱对药在麻杏甘石汤中配伍前后麻黄碱与甘草酸提取量的变化规律。