Benzo Urine Drug Test

Key Aspects of Benzo Urine Drug Test:

What it Detects: The test looks for metabolites (leftover byproducts) rather than the drug itself, with common tests detecting nordiazepam, oxazepam, and temazepam.

Purpose: It is used by employers, for probation monitoring, in rehab programs, and to diagnose overdose symptoms such as confusion, slurred speech, or slowed breathing.

Detection Times: While typically detecting use within 1–7 days, short-acting benzos may only show for 2-4 days, while heavy users might test positive for several weeks.

Limitations:

False Positives/Negatives: Certain medications like Sertraline or ibuprofen can trigger false positives, and some benzodiazepines (like lorazepam or clonazepam) are not always detected by standard immunoassays.

Specificity: A preliminary "presumptive" test may not differentiate between specific benzodiazepine types; follow-up confirmatory testing (GC-MS) may be required.

Commonly Screened Benzodiazepines: Includes Diazepam (Valium), Alprazolam (Xanax), Lorazepam (Ativan), and Clonazepam (Klonopin).

1. The Benzodiazepines (BZO) Rapid Test (Urine) provides only a qualitative, preliminary analytical result. A secondary analytical method must be used to obtain a confirmed result. Gas chromatography/mass spectrometry (GC/MS) is the preferred confirmatory method.

2. It is possible that technical or procedural errors, as well as other interfering substances in the urine specimen may cause erroneous results.

3. Adulterants, such as bleach and/or alum, in urine specimens may produce erroneous results regardless of the analytical method used. If adulteration is suspected, the test should be repeated with another urine specimen.

4. A positive result indicates presence of the drug or its metabolites but does not indicate level of intoxication, administration route or concentration in urine.

5. A negative result may not necessarily indicate drug‐free urine. Negative results can be obtained when drug is present but below the cut‐off level of the test.

6. Test does not distinguish between drugs of abuse and certain medications.

During testing, a urine specimen migrates upward by capillary action. Benzodiazepines, if present in the urine specimen below the cut‐off level, will not saturate the binding sites of the antibody in the test. The antibody coated particles will then be captured by immobilized Benzodiazepines‐protein conjugate and a visible colored line will show up in the test line region. The colored line will not form in the test line region if the Benzodiazepines level exceeds the cut‐off level, because it will saturate all the binding sites of anti‐Benzodiazepines antibody.