Carrying out measurements to identify treatment results makes it possible to detect problems and provide feedback on their therapeutic results in the participants, so that they can perceive the contribution that the Intervention is providing and detect drugs with greater impact on participants of the Service Center. The evaluation of therapeutic results in an addiction Prevention Center showed an increased in physical and psychological health, maintenance of work/academic responsibilities, and greater well-being was reported in coexistence with parents and friends. To achieve quality measurements, it is important to train professionals so that they can optimally carry out treatment evaluation in three 3 measurements at corresponding times; managing to operationally describe the target behavior so that they have more ability to propose solutions and alternatives in situations at risk of violence behavior. In this pilot study, it was seen that the average frequency of consumption decreased from a first measurement of 4.83 days to a second measurement of 2.5 and a final measurement of 1.3.