Benzodiazurqlcfm

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

This test checks for the presence of benzodiazepine drugs in your urine using a confirmatory method.

Quick summary

{"Detects benzodiazepine medications (e.g., Valium, Xanax, Ativan) in urine","Used to monitor medication compliance or detect drug misuse","Results help healthcare providers understand medication use patterns"}

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

Key facts at a glance

LOINC: 16195-0
Short code: BENZO-CONF
Synonyms: Benzodiaz Ur Ql Cfm
Category: chemistry
Sample: urine
Container: Sterile, leak-proof urine collection container with secure cap (preferably tamper-evident for forensic specimens)
Units: N/A
Ref low: 100
Ref high: 300
Fasting: false
Population: adult
Sex: all
Age range: 18–65 years
Method: confirm
CPT: 80346
SNOMED: 251443000
Specimen volume: 30-50 mL
Stability: Room temperature: up to 48 hours; Refrigerated (2-8°C): up to 7 days; Frozen (-20°C or below): up to 30 days
Hemolysis max: 0
Lipemia max: 0
Icterus max: 0
TAT: 24–72 hours
Order: routine

What is this test?

The Benzodiazepine urine test is a confirmatory laboratory test that detects the presence of benzodiazepines in your urine. Benzodiazepines are a class of prescription medications commonly used to treat anxiety, insomnia, seizures, and muscle spasms. Examples include diazepam (Valium), alprazolam (Xanax), lorazepam (Ativan), and clonazepam (Klonopin). This test uses a confirmatory method, which is more specific than initial screening tests and helps verify positive results.

Why is this test ordered?

Your healthcare provider may order this test for several reasons: to monitor if you are taking your prescribed benzodiazepine medication as directed, to check for drug misuse or unauthorized use of these controlled substances, to evaluate unexplained symptoms that may be related to medication levels, or as part of a comprehensive drug screening panel for medical, legal, or employment purposes.

How is the test performed?

A urine sample is collected in a sterile container. The sample is then analyzed in a laboratory using confirmatory methods such as gas chromatography-mass spectrometry (GC-MS) or liquid chromatography-tandem mass spectrometry (LC-MS/MS). These methods can not only confirm the presence of benzodiazepines but may also identify specific types. You do not need to fast or make special preparations for this test, but you should inform your healthcare provider about all medications, supplements, or herbal products you are taking.

Understanding your results

Results are typically reported as either "Positive" (benzodiazepines detected) or "Negative" (no benzodiazepines detected). A positive result indicates that benzodiazepine drugs or their metabolites were found in your urine. However, this test does not measure the amount of drug or indicate impairment. The presence of the drug may be due to a legitimate prescription. Your healthcare provider will interpret your results in the context of your medical history and current symptoms.

Reference range

Negative (cutoff concentration typically 100-300 ng/mL depending on specific benzodiazepine analyte)N/A

Specimen: urine

No fasting required. Patient should be informed that prescription and over-the-counter medications may affect results. Collect sample under chain-of-custody procedures if required for forensic or workplace testing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

How long do benzodiazepines stay detectable in urine?

Benzodiazepines can typically be detected in urine for 1-6 days after use, depending on the specific drug, dosage, frequency of use, individual metabolism, and kidney function. Long-acting benzodiazepines like diazepam may be detectable longer than short-acting ones like alprazolam.

Will a positive result mean I am abusing drugs?

Not necessarily. A positive result indicates the presence of benzodiazepines in your system, which could come from a legitimate prescription. Your healthcare provider will interpret the results considering your medical history, prescribed medications, and treatment goals.

Do I need to prepare for this test?

No special preparation is needed. However, it is important to inform your healthcare provider about all medications you are taking, including over-the-counter drugs and supplements, as some substances may affect test results. Bring a list of your current medications to your appointment.

Can this test tell how much medication I took?

No, this is a qualitative test that indicates presence or absence of benzodiazepines. It does not measure the quantity of drug in your system or determine if you are impaired.

What happens if my test is positive?

If your test is positive, your healthcare provider will discuss the results with you. They will consider whether the detected medication matches your prescription, assess your treatment plan, and determine if any adjustments are needed. The result will be kept confidential and used to guide your care.

Sources

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