Understanding This Test: What It Is, How It Is Done, and What Your Results Mean for Your Health
This test checks whether barbiturates, a type of sedative medication, are present in your urine sample.
{"Detects the presence of barbiturate drugs in your urine","Used to monitor prescribed medication use or screen for drug abuse","Results are reported as either Positive (found) or Negative (not found)","Barbiturates are rarely prescribed today due to safer alternatives"}
Key facts at a glance
- LOINC
- 3377-9
- Short code
- BARBU
- Synonyms
- Barbiturates Ur Ql
- Category
- chemistry
- Sample
- urine
- Container
- Sterile, leak-proof urine container without preservative
- Units
- N/A
- Ref low
- 3.5
- Ref high
- 7.2
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Immunoassay (screening) with confirmation by Gas Chromatography-Mass Spectrometry (GC-MS)
- CPT
- 80307
- SNOMED
- 33359004
- Specimen volume
- 30-50 mL random urine
- Stability
- Refrigerated (2-8°C): 7 days; Frozen (-20°C): 30 days; Room temperature: 24 hours
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–72 hours
- Order
- routine
This test is a medical evaluation that helps your healthcare provider check how your body is working and look for signs of illness or other health conditions. Your doctor may order it as part of a routine checkup, to help diagnose a specific concern, or to monitor a condition you already have.
The urine barbiturate test is a screening test that detects whether barbiturates are present in your urine. Barbiturates are a class of prescription sedative medications that were historically used to treat anxiety, insomnia, and seizure disorders. Today, they are rarely prescribed because safer alternatives (such as benzodiazepines) are available.
The test is performed by a trained member of your care team, usually in a doctor's office, clinic, or hospital. Depending on the type of test, it may involve giving a small sample, such as blood or urine, or having a simple measurement or scan. The procedure is typically quick, and you can usually return to your normal activities right afterward.
You will be asked to provide a urine sample in a sterile container. The sample is then sent to a laboratory where it is analyzed using specialized equipment to detect the presence of barbiturates or their metabolites. No special preparation is typically required, though you should inform your healthcare provider about any prescription medications, over-the-counter drugs, or supplements you are taking.
Your results show the measurements or findings from the test, and your healthcare provider will review them with you. Values within the expected range generally suggest typical body function, while values outside that range may point to a condition that needs closer attention. Always talk with your provider about what your specific results mean for you.
Your test results will typically be reported as either Positive or Negative: A Positive result means barbiturates were detected in your urine. A Negative result means no barbiturates were detected at the testing threshold. It is important to discuss your results with your healthcare provider, who will interpret them in the context of your medical history and current medications.
Reference range
NCBI: Uric Acid Male 3.5-7.2 mg/dL; Female 2.5-6.8 mg/dLN/A
No fasting required. Patient should be informed about the test purpose. Collect sample under chain-of-custody procedures if medico-legal testing is required. Avoid contamination during collection.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings2
Frequently asked questions
Why would my doctor order this test?
How long do barbiturates stay in urine?
Can anything else cause a positive result?
Is this test the same as a drug test for employment?
Sources
- 1
- 2
- 3
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 17, 2026. · Read our editorial policy