(1) Ambulatorio de Adolescentes e do Programa Equilibrio Instituto e Departamento de Psiquiatria do Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo (IPq-HC-FMUSP). Sao Paulo, Sao Paulo, Brazil. (2) Instituto e Departamento de Psiquiatria do Hospital das Clinicas da Faculdade de Medicina da Universidade de Sao Paulo (IPq-HC-FMUSP),Sao Paulo, Sao Paulo, Brazil. Conflict of interest: non-existent years. It may occur until the age of 12. Stuttering co occurs with language development and emerges from complex interactions among family history, social context, linguistic processes, and emotional factors, the motor organization of speech, and other aspects. This is a picture that, despite the multifactorial etiology, has genetic basis and corresponds to 80% of the total of stuttering cases which are identified during childhood. Initially, the demand for care was related to an attempt to control his impulses, once he would put himself in imminent life-threatening situations, due to his criminal life history (he would take part in armed robbery to houses and business establishments). As the psychological and psychiatric interventions helped him control those impulses, the adolescent presented a new demand for treatment: improve his communication skills, intervention that would help him in the search for healthier relationships. This way, the abstinence from the use of marijuana, the only drug ever used by the adolescent (despite having tried other ones), which had never been one of his preoccupations before (he would say that he could not identify injuries resulting from this activity), became the focus of the speech therapy approach. As the same ambulatory had already confirmed, in previous experiments, that adolescent drug users who are assisted by multidisciplinary and speech therapy care would respond better to the treatment (they would remain in psychiatric treatment for a longer time and, among the drug users, the ones who would use cannabis would be abstinent for a longer period of time)1, a process of specific approach started in order to promote fluency, being the incentive to marijuana abstinence made as one of the possible strategies to improve the fluency of speech, without being the main goal to the patient. DEAR EDITOR