The Influence of Chronic Ethanol Consumption on the Distribution of Thiopental in Rats

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Abstract
Ethanol was administered chronically for 14 days to male Sprague–Dawley rats. Day 15 was ethanol-free. On day 16 the rats received 25 mg of thiopental per kilogram (intravenously). One minute after the injection, the ethanol-treated rats showed lower blood levels of thiopental and higher liver levels of the drug than control rats given sucrose in place of ethanol. Samples of blood drawn 5 and 10 min after injection showed no significant difference in thiopental levels between the ethanol and control groups. The ethanol-treated group slept for a significantly shorter period of time. It is concluded that chronic ethanol consumption for 14 days decreases the pharmacological effects of thiopental and alters its initial distribution in the body.