COMPLEXES OF CIPROFLOXACIN WITH METAL-IONS CONTAINED IN ANTACID DRUGS

被引：20
作者：
TEIXEIRA, MHSF [1 ]
VILASBOAS, LF [1 ]
GIL, VMS [1 ]
TEIXEIRA, F [1 ]
机构：
[1] UNIV COIMBRA,FAC CIENCIAS & TECNOL,DEPT QUIM,P-3000 COIMBRA,PORTUGAL
来源：
JOURNAL OF CHEMOTHERAPY | 1995年 / 7卷 / 02期
关键词：
CIPROFLOXACIN; ANTACIDS; METAL IONS; MAGNESIUM; ALUMINUM; QUINOLONES;
D O I：
10.1179/joc.1995.7.2.126
中图分类号：
R73 [肿瘤学];
学科分类号：
100214 ;
摘要：
Simultaneous administration of antacids containing magnesium or aluminium and ciprofloxacin or other quinolones decreases the gastrointestinal absorption of those antibacterial agents. Current speculation about the mechanism of this interaction has focused on drug-cation chelation. The present study was designed to detect the protonation in solutions and the formation of the complex species at the pH levels typical of the gastrointestinal tract. It involves the study of ciprofloxacin in aqueous solutions containing Al3+ and (or) Mg2+ by combining the results of potentiometric and spectroscopic (H-1 nuclear magnetic resonance) techniques. Calculations were only performed for data in the range 4.5 < pH < 5.5 (pH levels typical of gastrointestinal tract) and the results of both methods are made self-consistent, assuming an equilibrium model including complex species MHL, MLOH (where H(2)L denotes ciprofloxacin and M is Al3+ or Mg2+); their formation constants are given.
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页码：126 / 132
页数：7
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