“…Thus, regarding polydrug abuse, one drug may precede self-adminsitration of a second drug. For example, cigarette smokers frequently report increases in craving and smoking behavior following the consumption of alcohol (Burton & Tiffany, 1997;Glautier, Clements, White, Taylor, & Stolerman,1996;Mintz, Boyd, Rose, Charuvastra, & Jarvik, 1985;Mitchell, de Wit, & Zacny, 1995). Similarly, nicotine has been demonstrated to have CS effects for the US effects of alcohol .…”