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Benzodiazurqlscn300ngml

Published: August 9, 2026Updated: August 16, 2026

This test checks whether benzodiazepine medications are present in your urine sample.

Quick summary

{"Detects the presence of benzodiazepine drugs in urine","Used to monitor medication compliance or detect drug misuse","Results are reported as positive if level exceeds 300 ng/mL","A positive result means benzodiazepines were found in your urine","False positives can occur with certain medications or supplements"}

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
70142-5
Short code
BENZ-U
Synonyms
Benzodiaz Ur Ql Scn>300 ng/mL
Category
chemistry
Sample
urine
Container
Sterile, leak-proof urine collection container without preservative (plastic screw-cap cup); for forensic/medico-legal testing, use tamper-evident chain-of-custody container.
Units
N/A
Ref high
300
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
screen-ng-ml
CPT
80307
SNOMED
250515002
Specimen volume
30-50 mL of random urine
Stability
Refrigerated (2-8°C): up to 7 days. Frozen (-20°C or below): up to 30 days for confirmatory testing. Room temperature: up to 24-48 hours depending on preservative.
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
1–24 hours
Order
routine

What is this test?

The Benzodiazepines Urine Screening Test is a laboratory test that detects whether benzodiazepine medications are present in your urine. Benzodiazepines are prescription drugs commonly used to treat anxiety, insomnia, seizures, and muscle spasms. Common examples include diazepam (Valium), alprazolam (Xanax), lorazepam (Ativan), and clonazepam (Klonopin). This test uses a screening method with a cutoff value of 300 ng/mL, meaning the test looks for benzodiazepine levels above this threshold.

Reference range

Negative (cutoff: >300 ng/mL). Result reported as positive when benzodiazepine concentration exceeds 300 ng/mL screening threshold.N/A

Specimen: urine

No fasting required. Patient should be informed that benzodiazepine use (prescribed or otherwise) may affect results. Collect sample under appropriate chain-of-custody procedures if required for medico-legal or employment-related testing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is primarily used for medication compliance monitoring to ensure patients are taking their prescribed benzodiazepines as directed by their healthcare provider. It may also be used in substance abuse evaluation, pain management programs, or pre-employment screening. A positive result indicates that benzodiazepines were detected in the urine at a concentration above 300 ng/mL. It's important to note that this is a screening test, and positive results may be confirmed with more specific testing methods if needed. The presence of benzodiazepines in urine can typically be detected for several days after last use, depending on the specific medication and individual factors such as metabolism and kidney function.

Frequently asked questions

Why do I need this test?
Your healthcare provider may order this test to check if you are taking your prescribed benzodiazepine medication as directed, to monitor for potential drug interactions, or as part of a routine drug screening. It helps ensure medication safety and compliance with your treatment plan.
How is the sample collected?
A urine sample is collected in a sterile container. You will be given instructions on how to collect a clean catch sample. The sample should be collected as directed and delivered to the laboratory for testing promptly.
What do the results mean?
A positive result means benzodiazepines were detected in your urine at a level above 300 ng/mL. A negative result means no benzodiazepines were detected, or the level was below the detection threshold. Your healthcare provider will interpret these results in the context of your medical history and prescribed medications.
Can medications or supplements affect the results?
Yes, certain medications and supplements may cause false positive results. Common culprits include some antidepressants, antipsychotics, and certain herbal supplements. Always inform your healthcare provider about all medications and supplements you are taking before the test.
How long do benzodiazepines stay detectable in urine?
The detection window varies depending on the specific benzodiazepine, dosage, frequency of use, and individual factors like metabolism and kidney function. Generally, benzodiazepines can be detected in urine for 1 to 7 days after last use, though some longer-acting versions may be detectable longer.
  1. 1
    MedlinePlus - Benzodiazepine TestSource
  2. 2
    Mayo Clinic Laboratories - Benzodiazepines, UrineSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy