The pharmacokinetics of oral rifampin was studied in rabbits (24 mg/kg
per day) as well as in humans (450 mg/d) who were taking antitubercul
osis medicine, after concurrent ciprofloxacin administration for a min
imum of 5 days. There were no significant changes in the maximum plasm
a concentration (C-max), time at C-max, area under the plasma concentr
ation-time curve, or elimination half-life of rifampin after ciproflox
acin coadministration in rabbits or humans.