@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .

<https://concepts.sagepub.com/social-science/concept/levo-alpha_acetyl_methadol>
  skos:prefLabel "levo-alpha acetyl methadol"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/buprenorphine>
  skos:prefLabel "buprenorphine"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/prescription_drugs>
  skos:prefLabel "prescription drugs"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/pharmaceutical_legislation>
  skos:prefLabel "pharmaceutical legislation"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/methadone>
  skos:prefLabel "methadone"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/benzodiazepines>
  skos:prefLabel "benzodiazepines"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/amyl_nitrite>
  skos:prefLabel "amyl nitrite"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/morphine>
  skos:prefLabel "morphine"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/cocaine_and_crack>
  skos:prefLabel "cocaine and crack"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/amphetamines>
  skos:prefLabel "amphetamines"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/caffeine>
  skos:prefLabel "caffeine"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/cannabis>
  skos:prefLabel "cannabis"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/drug_classification>
  skos:narrower <https://concepts.sagepub.com/social-science/concept/illicit_and_illegal_drugs>, <https://concepts.sagepub.com/social-science/concept/hallucinogens>, <https://concepts.sagepub.com/social-science/concept/over-the-counter_drugs>, <https://concepts.sagepub.com/social-science/concept/barbiturates>, <https://concepts.sagepub.com/social-science/concept/benzodiazepines>, <https://concepts.sagepub.com/social-science/concept/anxiolytic_drugs>, <https://concepts.sagepub.com/social-science/concept/club_drugs>, <https://concepts.sagepub.com/social-science/concept/caffeine>, <https://concepts.sagepub.com/social-science/concept/heroin>, <https://concepts.sagepub.com/social-science/concept/amphetamines>, <https://concepts.sagepub.com/social-science/concept/methadone>, <https://concepts.sagepub.com/social-science/concept/levo-alpha_acetyl_methadol>, <https://concepts.sagepub.com/social-science/concept/anabolic_steroids>, <https://concepts.sagepub.com/social-science/concept/inhalants>, <https://concepts.sagepub.com/social-science/concept/opioids>, <https://concepts.sagepub.com/social-science/concept/cannabis>, <https://concepts.sagepub.com/social-science/concept/methamphetamine>, <https://concepts.sagepub.com/social-science/concept/prescription_drugs>, <https://concepts.sagepub.com/social-science/concept/fentanyl>, <https://concepts.sagepub.com/social-science/concept/central_nervous_system_depressants>, <https://concepts.sagepub.com/social-science/concept/ecstasy_(drug)>, <https://concepts.sagepub.com/social-science/concept/central_nervous_system_stimulants>, <https://concepts.sagepub.com/social-science/concept/amyl_nitrite>, <https://concepts.sagepub.com/social-science/concept/methods_of_drug_administration>, <https://concepts.sagepub.com/social-science/concept/naltrexone>, <https://concepts.sagepub.com/social-science/concept/morphine>, <https://concepts.sagepub.com/social-science/concept/cocaine_and_crack>, <https://concepts.sagepub.com/social-science/concept/buprenorphine>, <https://concepts.sagepub.com/social-science/concept/tobacco>, <https://concepts.sagepub.com/social-science/concept/OxyContin>, <https://concepts.sagepub.com/social-science/concept/alcohol> ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/substance_abuse_treatment>, <https://concepts.sagepub.com/social-science/concept/pharmaceutical_legislation> ;
  a skos:Concept ;
  skos:definition "Although there are different methods that are used to classify drugs, the most common scheme groups drugs by their pharmacological similarity. However, this scheme does not work well for \"club drugs,\" which are discussed as a separate classification. [Source: <a href=\"https://sk.sagepub.com/reference/substance/n133.xml\" target=\"_blank\" data-id=\"to-sk\">Encyclopedia of Substance Abuse Prevention, Treatment, &amp; Recovery; Drugs, Classification of</a>]"@en ;
  skos:prefLabel "drug classification"@en .

<https://concepts.sagepub.com/social-science/concept/central_nervous_system_stimulants>
  skos:prefLabel "central nervous system stimulants"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/central_nervous_system_depressants>
  skos:prefLabel "central nervous system depressants"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/methods_of_drug_administration>
  skos:prefLabel "methods of drug administration"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/opioids>
  skos:prefLabel "opioids"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/OxyContin>
  skos:prefLabel "OxyContin"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/substance_abuse_treatment>
  skos:prefLabel "substance abuse treatment"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/inhalants>
  skos:prefLabel "inhalants"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/anabolic_steroids>
  skos:prefLabel "anabolic steroids"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/alcohol>
  skos:prefLabel "alcohol"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/naltrexone>
  skos:prefLabel "naltrexone"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/anxiolytic_drugs>
  skos:prefLabel "anxiolytic drugs"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/hallucinogens>
  skos:prefLabel "hallucinogens"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/methamphetamine>
  skos:prefLabel "methamphetamine"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/ecstasy_(drug)>
  skos:prefLabel "ecstasy (drug)"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/tobacco>
  skos:prefLabel "tobacco"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/heroin>
  skos:prefLabel "heroin"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/barbiturates>
  skos:prefLabel "barbiturates"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/illicit_and_illegal_drugs>
  skos:prefLabel "illicit and illegal drugs"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/over-the-counter_drugs>
  skos:prefLabel "over-the-counter drugs"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/conceptgroup/concepts>
  a skos:Collection, isothes:ConceptGroup ;
  skos:prefLabel "concepts"@en ;
  skos:member <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/fentanyl>
  skos:prefLabel "fentanyl"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .

<https://concepts.sagepub.com/social-science/concept/club_drugs>
  skos:prefLabel "club drugs"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/drug_classification> .