[Study on the compatibility of medicines of sini-tang by using Fourier transform infrared spectroscopy].

Fourier transform infrared spectroscopy (FTIR) was applied to analyze the different sini-tang formulas. The findings indicated that the FTIR spectra of different formulas show certain regular changes. According to the identification and assignment of the characteristic peaks, it is clear how the interaction of each single drug in the compound and the administrated amount influence the formulas. This method offers a new thought for exploring the formulas research of traditional Chinese medicine.