Drug abuse and the elderly.
D000368:Aged; D001294:Attitude to Health; D004358:Drug Therapy; D004363:Drug Utilization; D006801:Humans; D012306:Risk; D012931:Social Environment; D019966:Substance-Related Disorders / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D014481:United States