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Barbiturate (Secobarbital) Blood Level

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

This test measures the amount of secobarbital, a barbiturate medication, in your blood. It helps assess drug levels to ensure proper dosing and monitor for toxicity.

Quick summary

["This test helps doctors check if your medication levels are safe and effective."]

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

Key facts at a glance

LOINC
72397-3
Short code
Secobarbital Bld Cfm-mCnc
Synonyms
Secobarbital Bld Cfm-mCnc
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
confirm
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you’re taking secobarbital (a sedative or anticonvulsant) and want to check your blood levels. It may also be done if you’ve been exposed to barbiturates or if symptoms of overdose (like confusion, slow breathing, or unconsciousness) are present.

What to Expect Before the Test

No special preparation is needed. You’ll likely have a small needle inserted into your arm or hand to draw blood. The process takes about 5 minutes, and you may feel a brief pinch.

What the Results Mean

Results show the concentration of secobarbital in your blood. High levels may indicate overdose or improper dosing, while low levels could mean the medication isn’t working as intended. Your doctor will interpret these results in the context of your medical history and symptoms.

Possible Risks and Considerations

The most common risk is a minor bruise or slight discomfort at the injection site. Rarely, blood tests can cause allergic reactions or infections. If you have bleeding disorders or take blood thinners, let your doctor know before testing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Secobarbital Blood Level

Frequently asked questions

What does a high or low level of secobarbital indicate?
High levels may suggest overdose, drug interaction issues, or improper dosing. Your doctor may adjust your medication or monitor you closely for side effects like drowsiness, dizziness, or respiratory problems. Low levels might mean the medication isn’t working as expected, prompting a review of your dosage or alternative treatments.
How often should this test be done?
The frequency depends on your condition and medication regimen. For long-term use, your doctor may check levels periodically (e.g., every few weeks or months) to ensure safety and effectiveness. Acute cases (like overdose monitoring) may require more frequent testing.
Can diet or other medications affect this test?
Yes. Certain foods, supplements, or other medications (especially those metabolized by the liver) can influence barbiturate levels. Avoid alcohol and other sedatives before testing, as they may alter results. Always inform your doctor about all medications you’re taking.
  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