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The authors, both family physicians, report on a profile of fifty-eight (58) Montreal narcotic addicts admitted to a methadone treatment program in 1986. Their characteristic are similar to those published for addicts being treated in the United States. In particular, there is a high rate of involvement with crime, multiple drug abuse and family histories of violence. Certain characteristics are very helpful in the planning of future resources for the Montreal area and suggest possible avenues to primary prevention. The question is asked about which factors, if any, have prognostic significance.