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Antibiotic exposure and its relationship to postantibiotic effect and bactericidal activity: constant versus
1Department of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin. ronli@cuhk.edu.hk
Antimicrobial Agents and Chemotherapy
|August 1, 1997
Abstract:
In vitro postantibiotic effects (PAEs) exhibited by a standard strain of Pseudomonas aeruginosa following exposure to tobramycin at constant concentrations were compared to those at exponentially decreasing concentrations. Exposure to a constant concentration showed more extensive bacterial killing and resulted in longer PAEs at comparable areas under the concentration-time curves above the MIC. This phenomenon suggests a significant contribution of pharmacokinetics to antimicrobial pharmacodynamics.