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Chloramphenicol succinate pharmacokinetics in Macaca nemestrina: dose dependency study
The Journal of Pharmacology and Experimental Therapeutics
|November 1, 1981
Summary
This study on chloramphenicol succinate ester in monkeys found that while some pharmacokinetic parameters changed with dose, peak drug concentrations remained proportional to the dose administered. This suggests predictable dosing for chloramphenicol therapy.
Area of Science:
- Pharmacology
- Drug Metabolism
- Primate Studies
Background:
- Chloramphenicol succinate ester is a prodrug used to administer chloramphenicol.
- Understanding its pharmacokinetics is crucial for safe and effective therapeutic use.
Purpose of the Study:
- To investigate the dose-dependent pharmacokinetics of chloramphenicol succinate ester in Macaca nemestrina monkeys.
- To determine the relationship between administered dose and resulting chloramphenicol concentrations.
Main Methods:
- Rapid intravenous infusion of chloramphenicol succinate ester at varying doses (25, 100, 250 mg/kg) in five adolescent male monkeys.
- Randomized crossover study design.
- Collection of serum and urine samples over 5-6 hours for pharmacokinetic analysis.
Main Results:
- Unhydrolyzed ester excretion in urine was dose-independent (average 26.3%).
- Elimination rate, clearance, and volume of distribution of chloramphenicol succinate and chloramphenicol showed dose dependency.
- Peak chloramphenicol concentrations and elimination rate constant were not significantly dose-dependent.
Conclusions:
- Despite dose-dependent changes in some pharmacokinetic parameters, peak chloramphenicol levels are expected to correlate linearly with the administered dose of chloramphenicol succinate ester.
- This suggests predictable therapeutic drug monitoring for chloramphenicol when using this ester formulation.