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Barbiturate (e.g., secobarbital) concentration in urine

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

This test checks for the presence of barbiturate medications, such as secobarbital, in your urine. It helps determine if these drugs were used recently.

Quick summary

["This test helps monitor or rule out recent use of barbiturates, which can be used for medical or non-medical purposes."]

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

Key facts at a glance

LOINC
19692-3
Short code
Secobarbital Ur Ql Scn
Synonyms
Secobarbital Ur Ql Scn
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
screen
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What This Test Measures

Barbiturates are a class of drugs that can affect the central nervous system. Secobarbital is a specific type of barbiturate that was historically used as a sedative or hypnotic. This test detects the chemical compounds from these drugs in your urine, which may indicate recent ingestion.

Why It’s Done

Your healthcare provider may order this test if you have symptoms of barbiturate use, such as drowsiness, confusion, or respiratory issues. It could also be part of a broader drug screening process, such as for employment, legal reasons, or substance use evaluation.

Sample Collection and Preparation

You’ll collect a urine sample in a sterile container. The test is typically performed on the urine sample using a specialized laboratory method to detect barbiturate compounds.

What to Expect During the Test

No special preparation is needed for this test. You may be asked to provide a urine sample at your doctor’s office or a lab. The process is quick and usually painless.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

High levels of barbiturates in urine may suggest recent misuse, overdose, or medical use of these drugs. Barbiturates can be dangerous, especially when combined with other substances, as they can slow down breathing and heart function. Your healthcare provider will interpret the results in the context of your symptoms and medical history to determine the next steps.

Short name

Urine Drug Screen (Barbiturate)

Frequently asked questions

What does a positive result mean?
A positive result means that barbiturate compounds were detected in your urine. This could indicate recent use, but it doesn’t necessarily mean you were using them intentionally. It’s important to discuss your results with your healthcare provider to understand the full picture.
Will I need to do anything special if my test is positive?
If your test is positive, your healthcare provider may recommend further evaluation, such as additional tests or a conversation about your health and substance use. They may also suggest follow-up care or treatment options if needed.
Can false positives or negatives happen?
Yes, like all tests, urine drug screens can have some limitations. False positives may occur due to other substances or contamination, while false negatives can happen if the drug was used shortly before testing or if the sample was improperly collected or handled. Your healthcare provider will help clarify the results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

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