Codependency is a term used to describe a range of behaviors among persons who are affected by the problematic drug use of family members. This article analyzes how 32 Swedish parents of adult children with drug problems talked about and understood codependency. The sociology of trouble was used as a theoretical framework and three significant themes were identified in the interviews. The parents spoke about how they defined codependency troubles, how they discovered codependency, and how they set boundaries for their children. The parents talked about their situations as highly distressing, and third-party troubleshooters defined their troubles and problems as codependency. The parents generally rejected the advice to “close the door” on their children and engaged in a range of remedial actions. The analytical focus of this study on the identification, definition, and remedial actions of parents gives valuable insights into family disruptions related to drug problems.