Benzodiazepines (BZO): Serax (Oxazepam)
Benzodiazepines are a large class of drugs used primarily for sedation and anxiety relief. Examples of Benzodiazepines include diazepam (Valium), chlordiazepoxide (Librium), alprazolam (Xanax), and clonazepam (Klonopin). Most benzodiazepine use in the US is due to prescription use, but some benzodiazepines are diverted for illegal consumption. Outside the US, particularly in Europe, benzodiazepines are more widely abused.
Drug Class
Depressant/Sedative/Hypnotic
Trade Names
Xanax (alprozolam), Dalmane (Flurazepam), Clonopin (Clonazepam), Librium (chlordiazepoxide), Ativan (Lorazepam), Serax (Oxazepam), Valium (diazepam), Tranxene (Chlorazepate)
Street Names
Blue bombs, nerve pills, tranks, downers, blues, ruffies.
Effects Of Use
Drowsiness, dizziness, disorientation, muscle relaxation, coma.
Approximate Detection Time
Urine: up to 3 days (therapeutic); up to 4 weeks (chronic)

Oral Fluid: NA
Urine Cutoff Levels
Immunoassay (screening): 300 ng/mL

GC/MS (confirmation): 200 ng/mL. Of note, given the large number of benzodiazepine drugs (35+), be aware that GC/MS labs will not be able confirm for all of them.
Primary Antigen
Oxazepam
Common Cross-Reactants
Sertraline (Zoloft)


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