The pharmacokinetics of cefixime in the fasted and fed state.

Twenty healthy adult volunteers received single 400 mg oral doses of cefixime in an open, randomized, crossover study, administered twice in the fasted state and twice with a standard breakfast. The study design allowed both an evaluation of a potential food effect and also an analysis of both intrasubject and intersubject variability in the fasted and fed state. There was a small but significantly longer (approximately 1 h) time to peak concentration when the drug was given with food. Peak serum concentrations, area under the curve, and 24 h urinary recovery values were unchanged in the fed and fasted states. The terminal elimination half-life of the drug given after a meal (3.6 h) was slightly longer than that observed after dosing in the fasting condition (3.5 h). The intrasubject and intersubject variabilities were less than 12% and 33% respectively, for both area under the curve and 24 h urinary recovery, and were virtually the same for the fasted and fed occasions. Therefore, the drug may be administered with or without food.