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...- a dual presence of substance addition and mental illness - is not as uncommon as once believed. The extent to which dual diagnosis is widespread reflects a significant underlying current between drug and/or alcohol abuse and any one of many different psychiatric disorders. That such a detrimental coupling is not only physically damaging but also socially harmful speaks to the very common connection between such a destructive combination and the ensuing legal implications inherent to antisocial behavior directly associated with drug abuse and mental instability.

"It is clear that persons in treatment for drug dependence have very high rates of additional psychiatric disorders. In fact, comorbidity can be seen as the rule rather than the exception" (Rosenthal, 2003, p. 39).

II. LITERATURE REVIEW
Dual diagnosis is indicative of individuals diagnosed as being both mentally ill and drug addicts; while it is wholly possible to be dually diagnosed with a different secondary disease, drug abuse ranks high on the list where mental illness represents the first problem. Research findings indicate that...