Barbituratesctourscnmcnc
A urine test to detect the presence of barbiturates (sedative medications) in your system.
{"This test screens for barbiturates in your urine","It helps monitor medication compliance or detect drug use","Results are typically reported as positive or negative","A positive result may indicate legitimate medication use or substance exposure"}
Key facts at a glance
- LOINC
- 19275-7
- Short code
- BARB-U
- Synonyms
- Barbiturates CtO Ur Scn-mCnc
- Category
- chemistry
- Sample
- urine
- Container
- Sterile, leak-proof urine collection container without preservative (preferably a tamper-evident container for forensic or workplace testing)
- Units
- N/A
- Ref low
- 3.5
- Ref high
- 7.2
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- screen
- CPT
- 80307
- SNOMED
- 33367002
- Specimen volume
- 30-50 mL of random urine; minimum 10 mL required for screening
- Stability
- Refrigerated (2-8°C): up to 7 days. Frozen (-20°C or below): up to 30 days for confirmatory testing. Room temperature: stable for 24-48 hours. Avoid repeated freeze-thaw cycles.
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What is this test?
The Barbiturates Urine Screening Test is a laboratory test that detects the presence of barbiturates in your urine. Barbiturates are a class of sedative-hypnotic medications commonly used to treat anxiety, insomnia, and seizure disorders. This test uses a screening method with a specific cutoff concentration to determine whether barbiturates are present in your urine sample.
How is the test performed?
A urine sample is collected in a sterile container. The sample is then analyzed using immunoassay or other screening methods to detect barbiturates. The test result is reported as either negative (no barbiturates detected above the cutoff) or positive (barbiturates detected above the cutoff). If the screening test is positive, confirmatory testing may be performed to verify the result and identify the specific barbiturate present.
Why might I need this test?
Your healthcare provider may order this test for several reasons: to monitor patients taking barbiturate medications for compliance, to evaluate suspected drug overdose, as part of routine drug screening for employment or legal purposes, or to investigate unexplained symptoms such as excessive drowsiness or breathing problems.
Reference range
NCBI: Uric Acid Male 3.5-7.2 mg/dL; Female 2.5-6.8 mg/dLN/A
No fasting required. Patients should be informed that certain prescription and over-the-counter medications, as well as dietary substances, may produce positive results. Informed consent may be required depending on institutional policy and applicable laws.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
How long do barbiturates stay detectable in urine?
Will a positive result mean I'm misusing drugs?
Do I need to fast before this test?
Can over-the-counter medications cause a false positive?
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 17, 2026. · Read our editorial policy