AIM: To evaluate the pharmacokinetic properties and bioequivalence of two ciprofloxacin tablets in healthy Chinese subjects under fasting and fed conditions. METHODS: This is a randomized, open-label, two-period crossover study. Subjects were randomized to receive a single oral dose of the ciprofloxacin test or reference formulations 250 mg under fasting and fed conditions. Human plasma concentrations were determined using a liquid chromatography tandem mass spectrometry method (LC-MS/MS). A non-compartmental method by Phoenix WinNonlin 8.0 software was used for calculating pharmacokinetic parameters and evaluating bioequivalence of the two formulations. RESULTS: A total of 26 healthy subjects were enrolled the study under fasting conditions and completed it. The pharmacokinetic parameter values of the test and reference formulation under fasting conditions were as follows: C

AIM: To compare the bioavailability of norfloxacin tablets produced by Zhejiang Pharmaceutical Co., Ltd with the original product BACCIDAL, and to evaluate bioequivalence of two formulations, a randomized, open, two-cycle, self-crossing trial in healthy Chinese population was designed. METHODS: Under fasting and fed conditions, healthy volunteers were given a single dose of norfloxacin test or reference tablets for 100 mg. Liquid chromatography-mass spectrometry (LC-MS/MS) method were used to determine drug concentration in the plasma taken at different time points before and after dosing. Pharmacokinetic parameters and the bioequivalence of the two formulations were calculated by WinNonlin 7.0 software. RESULTS: A total of 28 healthy volunteers were enrolled and completed the fasting test. The pharmacokinetic parameters for test and reference preparations in fasting state were as follows: C

AIM: To evaluate the bioequivalence of two candesartan cilexetil tablet formulations in healthy Chinese subjects after administration of a single dose, and an artificial neural network model was established to predict the candesartan plasma concentration, and provide a basis for clinical rational use of drugs. METHODS: Thirty-two healthy Chinese subjects were enrolled for oral administration of a single 8 mg dose of candesartan cilexetil tablet (test or reference product) under fasting or fed conditions to conduct a bioequivalence study. The bioequivalence results were used to build a back-propagation artificial neural network model by MATLAB software, and the model was internally and externally verified to predict the plasma concentration. RESULTS: Under both fasting and fed conditions, the C