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Test Code UBENZ Benzodiazepine, Qualitative, Urine, LAB367

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)

Useful For

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

Day(s) Test Set Up

Monday through Sunday



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

Test Classification and CPT Coding