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Thiopental concentration in urine (mass concentration)

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

This test measures the amount of thiopental, a medication used during anesthesia, in your urine. It helps assess exposure or potential overdose.

Quick summary

["This test helps doctors monitor how your body processes thiopental after surgery or anesthesia."]

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

Key facts at a glance

LOINC
12370-3
Short code
Thiopental Ur-mCnc
Synonyms
Thiopental Ur-mCnc
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

Why is this test done?

Your healthcare provider may order this test if you’ve recently undergone anesthesia with thiopental, to check for residual drug in your system or to evaluate how your body handles the medication.

What does the result mean?

Higher than expected levels may indicate prolonged exposure to thiopental, which could affect recovery or require additional monitoring. Lower levels suggest the drug has cleared your system more quickly.

How is the sample collected?

A urine sample is collected, typically after you’ve been awake and not exposed to thiopental for a specified period (e.g., 24 hours). Follow your provider’s instructions precisely.

What should I expect during or after testing?

You may be asked to provide a urine sample at home or at a lab. Avoid drinking fluids right before testing if instructed, as this can dilute the sample. Results are usually reviewed by your doctor.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: This test is primarily used in postoperative or critical care settings to monitor thiopental metabolism, guide treatment adjustments, or assess compliance with recovery protocols.

Short name

Thiopental in urine

Frequently asked questions

How long does it take to get results?
Results may take several days to a week, depending on lab processing and your healthcare provider’s workflow. Follow-up may be scheduled if needed.
What does a high or low result mean?
High levels could signal delayed clearance, which may require medical intervention (e.g., supportive care). Low levels suggest normal processing, but further testing may still be needed to confirm.
Can I drink fluids before this test?
Check with your provider first—some tests require fasting or specific urine volume limits to ensure accurate 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