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  • Title: Effect of antacid medication on the pharmacokinetics of temafloxacin.
    Author: Granneman GR, Stephan U, Birner B, Sörgel F, Mukherjee D.
    Journal: Clin Pharmacokinet; 1992; 22 Suppl 1():83-9. PubMed ID: 1319875.
    Abstract:
    The effect of an antacid drug (Maalox 70) on the pharmacokinetics of temafloxacin was studied in 12 healthy young volunteers. The study was designed as a randomised open 2-period crossover trial in which temafloxacin was administered alone and with Maalox 70. In both treatments, temafloxacin was administered as a single oral 400mg dose on the morning of day 2. In the antacid regimen, 8 doses of Maalox 70 were administered every 2h on day 1, starting at 8am and ending with the last dose at 10pm; 5 doses were given on day 2, at 2.5 and 1h before administration of temafloxacin and 1, 3 and 5h after the temafloxacin dose. With coadministration of Maalox 70, peak plasma temafloxacin concentrations (Cmax) were reduced to 44.6% (+/- 24.5), and AUC(0-infinity) was reduced to 39.8% (+/- 17.4) of the corresponding values obtained when temafloxacin was given alone. Urinary excretion of temafloxacin was reduced to 46.0% (+/- 13.7) of that observed when temafloxacin was administered alone. Time to peak plasma concentration (tmax = 1.8h) was not affected by antacid administration. Comparable or greater antacid-associated reductions in relative bioavailability have been reported for other quinolones. As with other quinolones, the concurrent administration of temafloxacin and antacids should be avoided.
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