We previously reported that the protocols of bioequivalence studies on generic pravastatin sodium had not been standardized. The bioequivalence of generic drugs is confirmed by crossover studies using healthy volunteers. In this study, we examined protocols for bioequivalence studies on generic itraconazole (ITCZ) formulations which show poor absorption.Based on pharmacokinetic parameters obtained from pharmaceutical companies, we evaluated the protocols for studies on 5 generic formulations and the results of these studies. The sampling schedule, number of subjects and food intake status were found to be different for each study and there were also differences in the intra-individual variation index for Cmax and AUCt.In conclusion, it is difficult to accurately evaluate the quality of bioequivalence studies only on the basis of mean and standard deviation values that have been made publicly available.