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Hepatic elimination of diazepam: interactions with albumin, desflurane and sevoflurane
O Dale1, E J Frink, L Thommesen
1University of Trondheim, Department of Pharmacology and Toxicology, University Clinic, Norway.
Abstract:
We have studied the effect of sevoflurane and desflurane on the hepatic elimination of diazepam, by incubating slices of rat livers in a closed system. Protein free and protein containing (albumin 10 g litre-1) buffers were used to examine the effect of the anaesthetics on enzyme activity and diazepam binding to albumin. Both anaesthetics (in concentrations of 0.5, 1.5 and 3.0 mmol litre-1) reduced the elimination of diazepam slightly in the absence of albumin, while the presence of the protein increased elimination to a maximum of 30% at the greatest concentration of the anaesthetics. These data support previous observations that volatile anaesthetics may interact pharmacokinetically with both liver enzyme activity and drug binding to albumin.
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