[Non-drug cure of heroin addicts in association with chemical analysis as a factor of evaluation].

Group psychotherapy programme is applied in a heroin addiction treatment center in conjunction with a systematic planning of chemical analyses along the course of the cure. The addicts live under inspected regime. At best 25 out of 70 cases (36%) conclude the programme with occasional and non repetitive failures. The question of their follow-up beyond their treatment period arises in order to better evaluate their retrieval.