This paper focuses on substance use patterns in female adolescents with eating disorders. The authors had hypothesized that people with restricting eating disorders (anorexics) would report using less substances than age matched controls, and that people with purging eating disorders (bulimics) would use more substances than reported by age-matched controls. The sample consisted of 80 female adolescents, aged 12-17 (mean = 15.2) reporting to tertiary pediatric treatment center in Ontario, with survey results from a group of 4894 adolescents attending Ontario high schools serving as a comparison. (Surveys were administered as part of a province-wide examination of drug use in this population). As predicted, girls with restricting eating disorders reported using less alcohol, tobacco or cannabis than age-matched controls. Contrary to the authorsŐ prediction, girls with purging eating disorders used alcohol, tobacco and cannabis at levels that were similar to those reported by age-matched controls. Both groups reported use of caffeine. 1.7% ± 4.9% of girls with eating disorders reported having used ecstasy in the past 12 moths, and 4/17 (24%) of girls with purging eating disorders reported using ecstasy in the past 12 months, as compared with 5.1% of the Ontario high school sample. In comparison with purgers in general, those reporting ecstasy use also used a host of other drugs not used by others in the sample, including LSD, stimulants, PCP and tranquilizers. Overall, young women with eating disorders were no more likely to use ecstasy than adolescents without eating disorders, and those with restricting disorders are less likely to use ecstasy, or any other psychoactive substance.