Abstract:Objective: To study the adscription of plasma effective constituents of rat after oral administration of Paeonia lacliflora and Glycyrrhiza uralensis compound. Method: Based on the established HPLC analytical method of plasma effective constituents, analysis and comparison were carried out among HPLC profiles of plasma samples obtained after oral administration of different ingredient preparations such as P.lacliflora and G. uralensis compound, single ingredient and all the preparations. The adscription of plasma effective compounds were identified. Result: Eighteen compounds were detected under this method, three of which are metabolites and thirteen are original forum of compounds contained in P.lacliflora and G. uralensis compound. Conclusion: This method is simple, accurate and stable, it could be used to analyze plasma effective constituents of P.lacliflora and G. uralensis compound. Affirmation of plasma effective compounds is the basis of to explore active compounds of P.lacliflora and G. uralensis compound.