title: The epidemiology of nonmedical drug use.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D006801:Humans; D011619:Psychotropic Drugs; D019966:Substance-Related Disorders / Q000453:epidemiology* / Q000523:psychology; D006113:United Kingdom
chemical_list: D011619:Psychotropic Drugs