On the basis of the literature, one would suppose that carrying out UDS would provide an improvement in the management of patients with abuse or addiction and would be helpful, particularly in community office-based settings, as office-based management of opioid dependence grows up (Walley, Alperen et al. 2008). Despite the lack of significant evidence of efficacy, UDS are recommended to assess the use of psychoactive substances when abuse or addiction is suspected.