This research summary provides an overview of the findings from a review of the literature on the needs of, and services for, families of drug users. A literature search and review was conducted using standard bibliographic search procedures in order to: establish what is known about the support needs of families of drug users; establish what is known about effective ways of addressing those needs; examine whether, and how, family support groups/ services link with other services; examine whether involving families within the treatment or service offered to the drug user has beneficial effects upon the family and the drug user.