A study was carried out to investigate the efficacy of trypsin: chymotrypsin (Chymoral forte DS) preparation on burn patients by analysing the changes taking place in serum acute-phase proteins. Serum proteins were analysed qualitatively and quantitatively for both control and enzyme-treated groups by the methods of Western Blot, ELISA and Turbidimetric assays. Furthermore, the trypsin inhibitory capacity (TIC) of the sera was also determined. Significant differences were observed between a control group of patients and a parallel group treated with trypsin: chymotrypsin preparation. During the first phase of burn wounds an initial rise was seen in C-reactive protein, alpha 1-antitrypsin, alpha 2-macroglobulin and TIC in both the groups. In the following days, enzyme preparation inhibited the rise in C-reactive protein titres and enhanced the rise in alpha 1-antitrypsin, alpha 2-macroglobulin and TIC. The above studies clearly indicate that the changes in serum acute-phase proteins between the control and treated groups reflect the anti-inflammatory activity and hence the therapeutic efficacy of Chymoral forte DS.