title: Soft or hard, dependent or addicted?
mesh_terms: D000700:Analgesics / Q000145:classification; D006213:Hallucinogens / Q000145:classification*; D006801:Humans; D009294:Narcotics / Q000145:classification*; D012660:Semantics; D019966:Substance-Related Disorders; D009626:Terminology as Topic
chemical_list: D000700:Analgesics; D006213:Hallucinogens; D009294:Narcotics