“…A number of epidemiological studies conducted mainly in the United States indicate that this comorbidity is very high, greater in subjects under treatment, and that the concomitant presence of several disorders has major clinical, evolutionary, and therapeutic implications (Compton, Thomas, Stinson, & Grant, 2007;Swendsen et al, 2010).Dual disorders have been associated with an increase in the number of psychiatric admissions (Hunt et al, 2002); violence (Soyka, 2000); suicidal behavior (Appleby et al, 1999), an increase in health expenditure (McCrone et al, 2000), greater medical comorbidity (Dickey, Normand, Weiss, Drake, & Azeni, 2002), poor adherence to treatment (Kamali et al, 2001), and limited results of the latter in both pathologies (Carey et al, 1991).…”