Cefotetan disodium showed favorable tolerability in this study. The Cmax and AUCs of cefotetan disodium demonstrated dose-dependent pharmacokinetic characteristics after single dose over a dose range (0.5-2.0 g) in healthy subjects, whereas the t1/2 was independent of dose. Except for Vd, there was no difference in other pharmacokinetic parameters between multiple and single administration.