From soft to hard drugs.
D000661:Amphetamine; D002188:Cannabis; D003932:Heroin; D006801:Humans; D008238:Lysergic Acid Diethylamide; D011330:Prisons; D019966:Substance-Related Disorders
D003932:Heroin; D008238:Lysergic Acid Diethylamide; D000661:Amphetamine