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Thiopental (Drug Concentration)

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

This test measures the amount of thiopental, a barbiturate anesthetic, in your blood. It helps monitor your response to anesthesia and ensure safe dosing.

Quick summary

["This test tracks how much thiopental is in your blood during or after anesthesia."]

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

Key facts at a glance

LOINC
16223-0
Short code
Thiopental Ur Ql Cfm
Synonyms
Thiopental Ur Ql Cfm
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
confirm
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’re receiving thiopental as part of anesthesia. It helps adjust the dose to prevent oversedation or complications, especially in surgeries requiring deep sedation.

What Does the Result Mean?

Results are typically interpreted by your anesthesiologist or surgeon based on your clinical status, dose administered, and timing relative to surgery. Abnormally high or low levels may indicate improper dosing or complications.

How Is the Sample Collected?

A blood sample is drawn from a vein, usually in the arm, by a healthcare professional. The sample is sent to a lab for testing.

What Should You Expect Before the Test?

No special preparation is needed. If you’re receiving anesthesia, the test may be done during or shortly after surgery. Inform your provider if you’re pregnant, breastfeeding, or have allergies to anesthesia.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Thiopental Level

Frequently asked questions

How long does it take to get results after the blood draw?
Results are usually available within 24 hours, depending on lab processing times. Your healthcare provider will discuss findings with you during follow-up.
Can I eat or drink before this test?
No special fasting is required unless instructed by your provider. If you’re receiving anesthesia, avoid food/drink until fully recovered.
Is there any risk or side effect to this test?
The blood draw may cause mild discomfort or bruising. No other risks are associated with this test itself, but thiopental itself carries risks if misused (e.g., respiratory depression). Always follow your provider’s anesthesia protocol.
  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