Impairment limits comparable to a blood alcohol concentration (BAC) of 0.02%, are defined for 20 psychotropic drugs, including the most prevalent benzodiazepines, cannabis, GHB, hallucinogens and opioids.
Limits for graded sanctions, representing drug concentrations in blood likely to induce impairment comparable to BACs of 0.05% and 0.12%, are defined for 13 of the 20 substances.
Alprazolam (3 ng/ml)
Clonazepam (1.3 ng/ml)
Diazepam (57 ng/ml)
Fenazepam (1.8 ng/ml)
Flunitrazepam (1.6 ng/ml)
Nitrazepam (17 ng/ml)
Oxazepam (172 ng/ml)
Zolpidem (31 ng/ml)
Zopiclone (12 ng/ml)
THC (1.3 ng/ml)
Amphetamine (41 ng/ml)
Cocaine (24 ng/ml)
MDMA (48 ng/ml)
Methamphetamine (45 ng/ml)
GHB (10 300 ng/ml)
Ketamine (55 ng/ml)
LSD (1 ng/ml)
Buprenorphine (0.9 ng/ml)
Methadone (25 ng/ml)
Morphine (9 ng/ml)