Journal
EUROPEAN JOURNAL OF CLINICAL PHARMACOLOGY
Volume 58, Issue 1, Pages 37-40Publisher
SPRINGER-VERLAG
DOI: 10.1007/s00228-002-0439-4
Keywords
protein binding; ketamine; norketamine
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Ketamine is an anaesthetic agent extensively used in intensive care patients, and it has proved its efficacy in the management of burned patients. In these patients, alterations in serum protein binding occur that may have significant clinical implications. Scarce data were observed in the literature about the binding of ketamine to human plasma proteins, and no data about the binding of its active metabolites, norketamine (NK) and dehydronorketamine (DHNK) were found. In this study, protein binding of ketamine, NK and DHNK in human serum were determined using the ultrafiltration technique. The percentage of drug bound to serum proteins at 30degreesC was found to be 69%, 60% and 50% for DHNK, ketamine and NK, respectively, while these percentages were 75%, 64% and 54% for DHNK, ketamine and NK respectively at 20degreesC. The binding of ketamine and its metabolites was independent of drug concentration.
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