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Table 2 Substances analysed in oral fluid, cut-off concentrations and prevalence above cut-off concentrations

From: Use of alcohol and drugs by employees in selected business areas in Norway: a study using oral fluid testing and questionnaires

Compound Description Cut-offc ng/mL Prevalence % (n)
6-Acetylmorphine Metabolite of heroin 1.3 0.0 (0)
Alcohol   0.10 g/L 0.04 (1)
Alprazolam Benzodiazepine; anxiolytic 0.62 0.0 (0)
7-Aminoclonazepam Metabolite of clonazepam 0.71 0.0 (0)
7-Aminoflunitrazepam Metabolite of flunitrazepam 0.17 0.0 (0)
7-Aminonitrazepam Metabolite of nitrazepam 0.63 0.0 (0)
Amphetamine Stimulanta 24 0.09 (2)
Benzoylecgonine Metabolite of cocaine 9.8 0.04 (1)
Clonazepam Benzodiazepine; anticonvulsant, anxiolytic 0.63 0.0 (0)
Cocaine Stimulantb 1.8 0.04 (1)
Codeine Opioid analgesic, antitussive 7.5 0.3 (6)
Diazepam Benzodiazepine; anxiolytic, anticonvulsant, sedative 0.40 0.7 (16)
Flunitrazepam Benzodiazepine; anxiolytic 0.31 0.0 (0)
3,4-Methylenedioxy-methamphetamine (MDMA) Psychedelic hallucinogenic drugb 26 0.0 (0)
Methadone Opioid used mainly for opioid dependence, but also for analgesia 11 0.0 (0)
Methamphetamine Stimulantb 15 0.1 (3)
Morphine Opioid analgesic, also metabolite of codeine and heroin 7.1 0.2 (4)
Nitrazepam Benzodiazepine; anxiolytic 0.56 0.0 (0)
Nordiazepam Metabolite of diazepam 0.68 0.3 (6)
Oxazepam Benzodiazepine; anxiolytic, anticonvulsant, and metabolite of diazepam 4.9 0.04 (1)
∆9-Tetrahydrocannabinol (THC) Cannabisa 0.63 0.7 (16)
Zolpidem Short acting hypnotic 1.2 0.09 (2)
Zopiclone Short acting hypnotic 1.6 1.9 (43)
  1. aMostly used illegally in Norway
  2. bIllegal in Norway
  3. cConcentrations in neat oral fluid above which the analytical findings were regarded as positive