title: [Chemical content of street cannabis].
abstract: BACKGROUND
  There is little information available about the real content of cannabis consumed in France.
  
  
  OBJECTIVE
  To assess the chemical content, including adulterants and contaminants, and potency of cannabis samples obtained from end-users.
  
  
  METHODS
  Samples of resins considered by users to produce "unusual" effects were collected from habitual consumers and chemically analyzed.
  
  
  RESULTS
  Thirty-seven samples were obtained. Average THC content was 8.8%. The effects reported by users were consistent with the THC content. Apart from an unidentified fatty substance found in two samples, no adulteration was found.
  
  
  CONCLUSIONS
  This study, which relied on volunteers, enabled us to collect samples considered abnormal by experienced users. It did not confirm the numerous anecdotes of adulteration.
  
  
  CONCLUSIONS
  We suggest that this study should be widened to monitor the current chemical contents of cannabis derivatives available in France. The impact of providing users with the results remains to be evaluated.
authors.affiliation: Mission XBT, Médecins du Monde, Paris (75). s.levu@laposte.net
authors.forename: Stéphane
authors.initials: S
authors.lastname: Le Vu
authors.forename: Sylvain
authors.initials: S
authors.lastname: Aquatias
authors.forename: Nicolas
authors.initials: N
authors.lastname: Bonnet
authors.forename: Marie
authors.initials: M
authors.lastname: Debrus
authors.forename: Gilbert
authors.initials: G
authors.lastname: Fournier
authors.forename: Patrick
authors.initials: P
authors.lastname: Beauverie
mesh_terms: D002186:Cannabinoids / Q000032:analysis; D002188:Cannabis / Q000737:chemistry*; D004340:Drug Contamination; D005602:France / Q000453:epidemiology; D006801:Humans; D002189:Marijuana Abuse / Q000453:epidemiology
chemical_list: D002186:Cannabinoids