title: New Psychoactive Substances (NPS) - the Hydra monster of recreational drugs.
authors.affiliation: a Department of Laboratory Medicine , Karolinska Institutet , Stockholm , Sweden.|b Clinical Pharmacology and Clinical Chemistry , Karolinska University Laboratory , Stockholm , Sweden.
authors.forename: Anders
authors.initials: A
authors.lastname: Helander
authors.affiliation: c Swedish Poisons Information Centre , Stockholm , Sweden.
authors.forename: Matilda
authors.initials: M
authors.lastname: Bäckberg
mesh_terms: D015198:Designer Drugs / Q000008:administration & dosage* / Q000009:adverse effects / Q000737:chemistry; D014943:Global Health; D006801:Humans; D013287:Illicit Drugs / Q000009:adverse effects* / Q000737:chemistry; D011619:Psychotropic Drugs / Q000008:administration & dosage* / Q000009:adverse effects / Q000737:chemistry; D019966:Substance-Related Disorders / Q000453:epidemiology*
chemical_list: D015198:Designer Drugs; D013287:Illicit Drugs; D011619:Psychotropic Drugs