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Barbitalurqlscn

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

A urine test that screens for the presence of barbiturates, a class of sedative medications, to monitor drug therapy or detect potential misuse.

Quick summary

{"This test checks your urine for barbiturates, sedatives used to treat anxiety, insomnia, and seizures","It helps doctors monitor proper medication use or detect possible drug misuse","A simple urine sample is collected and analyzed in a laboratory","Results can show if barbiturates are present, but not the exact amount","Always inform your doctor about all medications you are taking before the test"}

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

Key facts at a glance

LOINC
19353-2
Short code
BARBU
Synonyms
Barbital Ur Ql Scn
Category
chemistry
Sample
urine
Container
Sterile, leak-proof urine collection container without preservatives (chain-of-custody container if forensic/legal specimen)
Units
N/A
Ref low
200
Ref high
300
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
screen
CPT
80307
SNOMED
395112001
Specimen volume
30-50 mL of random urine; minimum 10 mL
Stability
Refrigerated (2-8°C): 7 days; Frozen (-20°C or below): 30 days; Room temperature: 48 hours. If confirmation testing is required, freeze specimen for long-term storage.
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–48 hours
Order
routine

What is this test?

The Barbital Urine Screening Test is a diagnostic test that detects the presence of barbiturates in your urine. Barbiturates are a class of sedative-hypnotic medications that were historically prescribed for anxiety, insomnia, and seizure disorders. This screening test uses a method called 'Screen' to identify whether barbiturate compounds are present in your urine sample.

Why might I need this test?

Your healthcare provider may order this test for several reasons: (1) To monitor patients who are prescribed barbiturate medications to ensure proper dosing and compliance with treatment, (2) To detect potential misuse or unauthorized use of barbiturate drugs, (3) As part of a broader drug screening panel, (4) To evaluate symptoms that may be related to barbiturate use or withdrawal, or (5) Before certain surgical procedures or in occupational health settings where drug testing is required.

How is the test performed?

The test requires a urine sample. You will be given a clean collection container and instructed on how to collect a 'clean catch' midstream urine sample to avoid contamination. The sample is then sent to a laboratory where it undergoes screening analysis to detect the presence of barbiturates. The test is qualitative, meaning it determines whether barbiturates are present or not, rather than measuring the exact concentration.

What do the results mean?

A 'positive' result indicates that barbiturates were detected in your urine. A 'negative' result means no barbiturates were detected at the screening threshold. It is important to note that this is a screening test - if a positive result is obtained, confirmatory testing may be performed to identify the specific type of barbiturate present. Certain medications, foods, or medical conditions may potentially cause false-positive results, which is why your healthcare provider will interpret your results in the context of your medical history and current medications.

Reference range

Negative (not detected). Cutoff threshold typically 200-300 ng/mL depending on laboratory and assay used.N/A

Specimen: urine

No special preparation required. Patients should be informed that results may have legal implications and chain of custody protocols may apply for forensic testing. Informed consent may be required depending on jurisdiction.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings2

Frequently asked questions

How long do barbiturates stay detectable in urine?
The detection window depends on the specific barbiturate, dosage, frequency of use, and individual factors like metabolism and kidney function. Generally, barbiturates can be detected in urine for several days to up to 2-3 weeks after last use, especially with long-acting formulations.
Do I need to fast before this test?
No fasting is required for a urine screening test. However, you should inform your healthcare provider about all prescription medications, over-the-counter drugs, and supplements you are taking, as some substances may affect the test results.
Will a positive result show up on a employment drug test?
Yes, if barbiturates are detected in your urine and the testing panel includes this class of drugs, it may show as positive. Many standard drug panels do include barbiturates. If you have a legitimate prescription for a barbiturate medication, you should disclose this to your employer and provide documentation if required.
Can this test tell how much barbiturate I took?
No, this screening test is qualitative rather than quantitative. It indicates whether barbiturates are present but does not measure the amount. If quantification is needed, your doctor may order additional tests.
What should I do if my test is positive?
If your test is positive, discuss the results openly with your healthcare provider. If you are taking a prescribed barbiturate, bring your prescription documentation. If you are misusing barbiturates, your provider can help you access appropriate treatment and support services.
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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