OBJECTIVE: To determine the effect on the relative bioavailability (Fr) of a staggered single dose of ciprofloxacin given two hours after a morning dose of calcium carbonate given three times daily over the three previous days. DESIGN:Thirteen male volunteers participated in this randomized, nonblinded, crossover investigation; 12 subjects were included in the final analysis. SETTING: Data collection and ciprofloxacin administration occurred at Albany Medical Center, a tertiary-care teaching institution. Calcium carbonate administration was on an outpatient basis. RESULTS: For 12 volunteers, the mean +/- SD Fr of ciprofloxacin staggered with calcium was 0.87 +/- 0.23 (noncompartmental model) and 0.98 +/- 0.27 (compartmental model). Other statistically significant findings were a decrease in the time to maximum concentration of ciprofloxacin staggered with calcium in serum compared with ciprofloxacin alone (from 1.76 +/- 0.54 to 1.23 +/- 0.52 h in the noncompartmental model; p < 0.05), and a decrease in the same parameter (from 1.92 +/- 0.96 to 0.77 +/- 0.53 in the compartmental model; p < 0.005). Maximum concentration of ciprofloxacin staggered with calcium was decreased in the noncompartmental model compared with ciprofloxacin alone (from 2.11 +/- 0.72 to 1.60 +/- 0.33, respectively; p < 0.05). The elimination half-life and area under the concentration-time curve of ciprofloxacin were not significantly altered. CONCLUSIONS: Repeated doses of calcium carbonate, administered two hours before ciprofloxacin, did not significantly alter the Fr of this fluoroquinolone.
RCT Entities:
OBJECTIVE: To determine the effect on the relative bioavailability (Fr) of a staggered single dose of ciprofloxacin given two hours after a morning dose of calcium carbonate given three times daily over the three previous days. DESIGN: Thirteen male volunteers participated in this randomized, nonblinded, crossover investigation; 12 subjects were included in the final analysis. SETTING: Data collection and ciprofloxacin administration occurred at Albany Medical Center, a tertiary-care teaching institution. Calcium carbonate administration was on an outpatient basis. RESULTS: For 12 volunteers, the mean +/- SD Fr of ciprofloxacin staggered with calcium was 0.87 +/- 0.23 (noncompartmental model) and 0.98 +/- 0.27 (compartmental model). Other statistically significant findings were a decrease in the time to maximum concentration of ciprofloxacin staggered with calcium in serum compared with ciprofloxacin alone (from 1.76 +/- 0.54 to 1.23 +/- 0.52 h in the noncompartmental model; p < 0.05), and a decrease in the same parameter (from 1.92 +/- 0.96 to 0.77 +/- 0.53 in the compartmental model; p < 0.005). Maximum concentration of ciprofloxacin staggered with calcium was decreased in the noncompartmental model compared with ciprofloxacin alone (from 2.11 +/- 0.72 to 1.60 +/- 0.33, respectively; p < 0.05). The elimination half-life and area under the concentration-time curve of ciprofloxacin were not significantly altered. CONCLUSIONS: Repeated doses of calcium carbonate, administered two hours before ciprofloxacin, did not significantly alter the Fr of this fluoroquinolone.
Authors: Payam Nahid; Susan E Dorman; Narges Alipanah; Pennan M Barry; Jan L Brozek; Adithya Cattamanchi; Lelia H Chaisson; Richard E Chaisson; Charles L Daley; Malgosia Grzemska; Julie M Higashi; Christine S Ho; Philip C Hopewell; Salmaan A Keshavjee; Christian Lienhardt; Richard Menzies; Cynthia Merrifield; Masahiro Narita; Rick O'Brien; Charles A Peloquin; Ann Raftery; Jussi Saukkonen; H Simon Schaaf; Giovanni Sotgiu; Jeffrey R Starke; Giovanni Battista Migliori; Andrew Vernon Journal: Clin Infect Dis Date: 2016-08-10 Impact factor: 9.079