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Test Code UBENZ Benzodiazepine, Qualitative, Urine, LAB367



Note: This is a screening test only. No confirmation will be done unless it is specifically ordered.

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements

For situations where chain-of-custody is required, a complete chain-of-custody protocol must be maintained when collecting and handling specimens.



Preferred: Random urine specimen

Specimen Volume: 0.5 mL from a random urine collection.

Stability: Store in the refrigerator if less than 24 hours.  If need to store longer than 24 hours,

                 freeze the specimen.  Specimens should be within the pH range of 5 – 8.

                Specimens with a pH outside this range should be adjusted to this range by the addition

                of 1N HCl or 1N NaOH before analysis.

                Specimens should be at a temperature of 20 – 25°C before analysis.


Note: 1. A completed Chain-of-Custody Form is required when processing a chain-of-custody


2. Presence of detergents or bleach in specimen may interfere with assay.

Reference Values

Not detected (cutoff <200 ng/mL)

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding


Useful For

Benzodiazepine testing is used in the diagnosis and treatment of benzodiazepine overdose and in the monitoring of medicinal levels.