RESUMEN
OBJECTIVE: to identify the reasons and motivations why family members search treatment for the drug addicted. METHOD: descriptive qualitative research, developed in 2012 and 2013, in a Drug Addicts Rehabilitation Unit of Parana State, Brazil. A total of 19 semi-structured interviews were conducted with the drug addicts' family members in treatment. The results were analyzed based on the Transtheoretical Model of Behavior Change and organized in thematic categories according with qualitative data analysis. RESULTS: the search for treatment for drug addicts occurred: in the pre-contemplation stage influenced by external factors; in the contemplation stage both for ambivalence and behavioral changes needs; in the action stage by awareness of drug addiction and also professional help needs; and in the maintenance stage because of the non-conservation of behavioral changes. CONCLUSION: an evaluation of motivational stages in the beginning of treatment is required for expansion of success possibilities in the rehabilitation process.