[Anti-inflammatory effects and quantitative study of the combinations of active ingredients of Painong powder in mice].

Objective: To study the anti-inflammatory effects of the combinations of active components of Painong powder, a compound traditional Chinese herbal medicine, and the quantitative analysis of their interactions.

Methods: The mouse model of acute inflammation with increase of capillary permeability was induced by intraperitoneal injection of acetic acid. An orthogonal design with 2 levels (used and unused) was applied to assign the combinations groups of active ingredients including naringin and neohesperidin, peoniflorin, and platycodin. Aspirin and normal saline were administered as control. The pharmacodynamic interactions were analyzed by the optical density (OD) of infiltrated Evans blue.

Results: The different combinations of active ingredients showed anti-inflammatory effect with different degree, and the predicted values of OD varied from 0.115 to 0.170. The maximum anti-inflammatory effect was from the combination of naringin, neohesperidin, paeoniflorin and platycodin, better than that of the saline group (P < 0.01). However, there was no significant difference as compared with the aspirin group (P > 0.05). Paeoniflorin showed a dominant contribution to the formula, and platycodin the least. The combination of all active components exhibited synergism.

Conclusion: The results suggest that all the ingredients are efficacious constituents of the formula, and paeoniflorin shows a dominant contribution to the formula. More information about prescription compatibility can be obtained by the orthogonal simulation method.