The authors report on a six-month follow-up of the first 252 male narcotic addicts treated at Lexington under the provisions of the Narcotic Addict Rehabilitation Act. Data based on the aftercare counselors' monthly evaluation forms are presented on drug use, employment, involvement with the law, recommittal, and cooperation with the aftercare system. The authors compare the results of their study with those of others and discuss the difficulties inherent in comparing such studies.Abstract Teaser