Barbituratesotherurmcnc
A urine test that detects barbiturates, a class of sedative-hypnotic medications, in your urine sample.
{"This test checks for barbiturate drugs (like phenobarbital, secobarbital) in your urine","It is commonly used for medication monitoring, drug abuse screening, or forensic testing","Results indicate whether barbiturates are present and sometimes how much","Follow your healthcare provider's instructions for sample collection"}
Key facts at a glance
- LOINC
- 53735-7
- Short code
- URBARBO
- Synonyms
- Barbiturates.other Ur-mCnc
- Category
- chemistry
- Sample
- urine
- Container
- Sterile, leak-proof urine collection container without preservatives (preferably a tamper-evident container for forensic or workplace testing)
- Units
- N/A
- Ref low
- 0
- Ref high
- 200
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Immunoassay (screening) with confirmation by Gas Chromatography-Mass Spectrometry (GC-MS) or Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
- CPT
- 80307
- SNOMED
- 250628007
- Specimen volume
- 30-50 mL
- Stability
- Room temperature: 24 hours; Refrigerated (2-8°C): 7 days; Frozen (-20°C or below): 30 days. For forensic specimens, follow chain-of-custody storage requirements.
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 24–72 hours
- Order
- routine
What is this test?
The Barbiturates Urine Test is a laboratory test that detects the presence of barbiturates in your urine. Barbiturates are a class of prescription medications that act as central nervous system depressants. They are typically used for sedation, hypnosis (sleep induction), seizure control, and anesthesia. Common barbiturates include phenobarbital, secobarbital, amobarbital, and pentobarbital.
This test uses your urine sample to determine whether barbiturate drugs are present in your body. It may also measure the amount (concentration) of these drugs if ordered as a quantitative test.
Reference range
Negative: <200 ng/mL (cutoff varies by laboratory). Positive results indicate the presence of barbiturates other than the specific types tested in dedicated assays (e.g., phenobarbital, butabarbital).N/A
No special preparation required. Patients should be informed that certain prescription medications, over-the-counter drugs, and herbal supplements may produce positive results. A complete medication history should be provided.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings5
Frequently asked questions
How is the urine sample collected?
How long do barbiturates stay detectable in urine?
Do I need to prepare for this test?
What do the results mean?
Are there any risks to this test?
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 16, 2026. · Read our editorial policy