Comparative pharmacokinetic study of Anisodamine Hydrobromide tablets and injection in septic acute lung injury rats.

We aimed to establish a sensitive LC-MS/MS method to analyze the pharmacokinetics of Ani HBr tablets and injection. Around 10 mmNHAc containing 0.1% formic acid and acetonitrile were used as the mobile phase. Acute lung injury in septic and normal rats, respectively, were administered Ani HBr tablets at doses of 12.5, 25 and 50 mg/kg and injection at doses of 4, 8 and 16 mg/kg, followed by extraction of the drugs from plasma using ethyl acetate for subsequent analysis. The method met the requirements for biological analysis. Ani HBr tablets absorbed slowly in rats with disease, tail vein administration was a more promising approach for treating septic acute lung injury.