Abstract:Objective: To study the pharmacokinetics of curcumin microcystin in rats. Methods: The microcystin was orally administrated. After carotid artery cannulation, blood samples were collected after administration of 0.08, 0.25, 0.5, 0.75, 1, 2, 3, 4, 5.5 h, and tested by HPLC. Results: The various doses of curcumin concentration-time curve is bimodal; Cmax1 and Cmax2 of each dose group are as follows: high-dose(0.90, 1.20 mg/L), medium dose(0.43, 0.46 mg/L), low dose(3.16, 1.31 mg/L); AUC are 3.79, 2.60, 5.92 mg·h/L respectively. Cmax and AUC of low dose are greater than that of the high and medium doses. Conclusion: The Pharmacokinetics of curcumin were nonlinear process in rat, there may be the phenomenon of enterohepatic circulation.