In France, the model for treating substance users is currently dominated by the harm reduction paradigm. Narcotics Anonymous groups offer their members an alternative approach based on abstinence from all behavior-altering substances. These self-help groups promote a lay expertise that draws on the realm of feelings and emotions, presenting drug use as a form of suffering and participation in the group as a form of redemption. This article proposes a dual approach focused both on analyzing interactions within the NA group and on examining relationships with other professional approaches. (Publisher’s presentation)