Abstract:At the premise of ensuring efficacy and minimizing adverse reactions as far as possible,it doesn‘t achieve to the treatment purpose at the cost of physiological function injury in normal tissue,which is the characteristic of the symptoms and signs targeted theory of the formula corresponding to syndromes in traditional Chinese medicine (TCM). The occurrence of the adverse reactions of Chinese and western drugs is related to formula not corresponding to syndromes to a large extent. It is beneficial to minimizing the occurrence of the adverse reactions when the indication of western drugs is screened in the macroscopic level for patients by using the idea of formula corresponding to syndromes for reference.