New York state journal of medicine
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In a retrospective and prospective study using DSM-III-R criteria for substance dependence in 232 inpatients and 51 outpatients, the clinical suspicion that cocaine addicts use other drugs including marijuana was confirmed. As many as 53% of cocaine addicts diagnosed by DSM-III-R criteria for cocaine dependence qualified for a diagnosis of cannabis dependence. ⋯ The diagnosis of other drug use and dependence in cocaine dependence has importance with regard to prognosis and treatment. This study found a high prevalence of marijuana (cannabis) dependence in patients with cocaine dependence.