ABSTRACT
The physicochemical environment and action are similar between the traditional decoction and the extract technics with water or alcohol in the production of Chinese patent drug. Different heating time inevitably differs Chinese patent drug from its decoction; and the alteration of extracting dissolvent make great changes in the chemical constitution. All these lead to the change in the nature of a Chinese patent drug. The authors hold that it is difficult to embody exactly the aim of the prescription of Chinese drug in the existing production technology of Chinese patent drug. It is necessary to advance innovative thoughts of adopting modern technology to extract effective ingredients from single Chinese drug and in the reference of traditional decoction, recombining the composition and dosage of Chinese patent drug.