@prefix n9j: <http://data.loterre.fr/ark:/67375/N9J> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .

n9j: a skos:ConceptScheme .
n9j:-G8K6H7D9-L
  skos:prefLabel "types of drugs"@en ;
  a skos:Concept ;
  skos:narrower n9j:-NJ0DNRW1-T .

n9j:-PBZ2NL5L-F
  skos:prefLabel "controlled drugs"@en ;
  a skos:Concept ;
  skos:narrower n9j:-NJ0DNRW1-T .

n9j:-MB48CG9B-5
  skos:prefLabel "drug classification"@en ;
  a skos:Concept ;
  skos:narrower n9j:-NJ0DNRW1-T .

n9j:-HZQD60C2-B
  skos:prefLabel "substance abuse"@en ;
  a skos:Concept ;
  skos:narrower n9j:-NJ0DNRW1-T .

n9j:-NJ0DNRW1-T
  skos:broader n9j:-MB48CG9B-5, n9j:-XFVF8MMV-M, n9j:-PBZ2NL5L-F, n9j:-HZQD60C2-B, n9j:-G8K6H7D9-L, n9j:-QZ227Z5R-D ;
  skos:prefLabel "methadone"@en ;
  owl:sameAs <https://concepts.sagepub.com/social-science/concept/methadone> ;
  skos:definition "Methadone, a synthetic narcotic with a suppression effect lasting 24 to 36 hours, is the most effective medication to help heroin patients overcome their addiction. Methadone maintenance treatment (MMT) rapidly expanded following its demonstration as an effective medical intervention in the mid-1960s. [Source: Encyclopedia of Social Problems; Methadone]"@en ;
  a skos:Concept ;
  skos:inScheme n9j: .

n9j:-QZ227Z5R-D
  skos:prefLabel "analgesics"@en ;
  a skos:Concept ;
  skos:narrower n9j:-NJ0DNRW1-T .

n9j:-concepts
  a isothes:ConceptGroup ;
  skos:prefLabel "concepts"@en ;
  skos:member n9j:-NJ0DNRW1-T .

n9j:-XFVF8MMV-M
  skos:prefLabel "drug antagonists"@en ;
  a skos:Concept ;
  skos:narrower n9j:-NJ0DNRW1-T .