The dopamine transporter and addiction / William M. Meil and John W. Boja -- Neurochemistry of nicotine dependence / Darlene H. Brunzell -- Neurochemical substrates of habitual tobacco smoking / Irina Esterlis, Suchitra Krishnan-Sarin, and Julie K. Staley -- Neurochemical and neurobehavioral consequences of methamphetamine abuse / Colin N. Haile -- Neurochemical adaptations and cocaine dependence / Kelly P. Cosgrove and Julie K. Staley -- Neuropsychiatric consequences of chronic cocaine abuse / Deborah C. Mash -- Neurobiology of 3,4-methylenedioxymethamphetamine (MDMA or ecstasy) / Michael H. Baumann and Richard B. Rothman.