Cocaine-induced changes in CNS dopamine release Cocaine-induced changes in CNS dopamine release. Dopamine was measured in the extracellular fluid of the nucleus accumbens of rats after daily injections of cocaine (10 mg/kg, i.p.). The first injection of cocaine produced a modest increase and the last, after 7 days, produced a much greater increase in dopamine release. The first saline injection produced no effect on dopamine levels, whereas the second, given 3 days after 7 days of cocaine injections, produced a significant rise in dopamine, presumably due to conditioning. (Adapted from Kalivas and Duffy, 1990. Copyright © Wiley-Liss, Inc., a subsidiary of John Wiley & Sons, Inc.) Source: Drug Addiction, Goodman & Gilman's: The Pharmacological Basis of Therapeutics, 12e Citation: Brunton LL, Chabner BA, Knollmann BC. Goodman & Gilman's: The Pharmacological Basis of Therapeutics, 12e; 2011 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/1613/bru12_ch24_f002.png&sec=102159691&BookID=1613&ChapterSecID=102159667&imagename= Accessed: October 11, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved