Cocaine use is widespread, affecting as many as one in six adults across a wide range of socioeconomic strata and ethnocultural groups in the United States (Shaffer and Eber, 2002) and internationally (http://www.who.int/substance_abuse/facts/cocaine/en/ accessed May 15, 2008). Cocaine dependence, while less prevalent, may affect as many as 3% of the adult U.S. population (Shaffer and Eber, 2002) and is associated with substantial social, vocational, and medical impairment and healthcare and legal costs to the individual and society.
