The effect of ethanol on evoked dopamine release in the caudate putamen has been measured in behaving animals with in vivo electrochemistry. Dopamine was measured with fast-scan cyclic voltammetry in adult male rats to resolve the competing processes of dopamine uptake and release. Ethanol dose dependently decreased dopamine efflux compared with salinetreated animals: to 89 % of controls with 0.5 g/kg, 70 % with 1 g/kg, 34 % with 2.5 g/kg, and 18 % with 5 g/kg. This decrease was not due to a change in uptake, as measured by the rate of dopamine disappearance after stimulation, and therefore can be attributed to decreased dopamine release. Additionally, it was not mediated by a decrease in biosynthesis, as measured by L-DOPA accumulation after NSD 1015 administration. The selective dopamine uptake inhibitor GBR 12909 compensate
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