Drug abuse--the problem in the United States.
D000662:Amphetamines; D003042:Cocaine; D006213:Hallucinogens; D006801:Humans; D009293:Opioid-Related Disorders / Q000453:epidemiology; D019966:Substance-Related Disorders / Q000453:epidemiology*; D014481:United States
D000662:Amphetamines; D006213:Hallucinogens; D003042:Cocaine