“…Recent studies have provided growing support for the clinical importance of cannabis withdrawal. For example, the majority of adults and adolescents enrolled in outpatient treatment for cannabis dependence report having experienced withdrawal symptoms following a quit attempt, report difficulty achieving initial periods of abstinence, complain that withdrawal contributes to their inability to quit, and report using cannabis or taking other direct action to alleviate withdrawal symptoms (Budney, Novy, & Hughes, 1999;Budney, Radonovich, Higgins, & Wong, 1998;Coffey et al, 2002;Copeland, Swift, & Rees, 2001;Copersino et al, 2006;Crowley, MacDonald, Whitmore, & Mikulich, 1998;Stephens, Babor, Kadden, Miller, & the Marijuana Treatment Project Research Group, 2002;Vandrey, Budney, Moore, & Hughes, 2005).…”