Barbitalmsmtur
This test detects barbital, a barbiturate medication, in your urine to monitor drug use or treatment compliance.
{"Barbital is a barbiturate medication used for sleep and anxiety disorders","The test checks if barbital is present in your urine","It may be ordered to monitor treatment compliance or detect drug abuse","Results are reported as positive or negative","Follow your healthcare provider's instructions before the test"}
Key facts at a glance
- LOINC
- 110546-9
- Short code
- BARBUR
- Synonyms
- Barbital Msmt Ur
- Category
- chemistry
- Sample
- urine
- Container
- Sterile, leak-proof urine collection container without preservatives; preferably a plastic screw-capped specimen cup
- Units
- N/A
- Ref low
- 0
- Ref high
- 50
- Critical range
- — – 5000 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Gas Chromatography-Mass Spectrometry (GC-MS) or Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
- CPT
- 80307
- SNOMED
- 404684003
- Specimen volume
- 20-50 mL of random or spot urine
- Stability
- Refrigerated (2-8°C): up to 7 days; Frozen (-20°C or below): up to 1 month for forensic samples; Room temperature: up to 48 hours
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 24–72 hours
- Order
- routine
What is this test?
The Barbital Urine Test is a laboratory test that detects the presence of barbital (also known as barbitone) in your urine. Barbital is a barbiturate class medication that was historically prescribed for insomnia, anxiety, and as an anticonvulsant. This test is part of a broader category of urine drug testing used to monitor medication adherence or detect potential drug misuse.
How is the test performed?
A urine sample is collected in a sterile container. The sample is then analyzed in a laboratory using specialized techniques to detect the presence of barbital or its metabolites. No special preparation is typically required, but you should inform your healthcare provider about any medications, supplements, or substances you have recently taken, as these may affect the results.
What do the results mean?
Results are typically reported as either 'Positive' (barbital detected) or 'Negative' (no barbital detected). A positive result may indicate that you have taken barbital or a related barbiturate medication. Your healthcare provider will interpret the results in the context of your medical history, current medications, and the reason for testing. It is important to discuss your results with your healthcare provider to understand what they mean for your specific situation.
Reference range
Not normally detected in urine of unexposed individuals. Reporting limit typically ≤ 50 ng/mL. Quantitative results reported in ng/mL or μg/L.N/A
No special preparation required. Patient should be informed that barbital is a barbiturate and that results may have legal and clinical implications. Verify chain of custody if forensic testing is required.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Why is this test ordered?
Do I need to fast before this test?
How long does barbital stay in urine?
Can other medications affect the test results?
Is the test confidential?
Sources
- 1
- 2
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.
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