Skip to content

Serum/Plasma Concentration of Secobarbital (Mass Concentration)

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, especially in cases of overdose or monitoring therapeutic use.

Quick summary

["Understanding your secobarbital levels can help ensure safe and effective treatment."]

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

Key facts at a glance

LOINC
27049-6
Short code
Secobarbital Mlk-mCnc
Synonyms
Secobarbital Mlk-mCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Doctors may order this test if you’ve been prescribed secobarbital (a sedative/hypnotic) or if you’ve experienced symptoms like confusion, drowsiness, or breathing difficulties that could be linked to drug exposure. It’s also used in overdose situations or to monitor long-term treatment.

What to Expect Before the Test

No special preparation is needed. You’ll typically provide a blood sample drawn from a vein in your arm. If you’re on other medications or have conditions like liver disease, let your provider know.

What the Results Mean

Results show the concentration of secobarbital in your blood. High levels may indicate overdose or improper dosing, while lower levels could suggest insufficient medication. Your doctor will interpret results based on your clinical picture.

Common Causes of Abnormal Results

Elevated levels may result from recent secobarbital use, misuse, or interactions with other drugs (e.g., alcohol). Low levels might occur if the medication isn’t absorbed properly or if you’re metabolizing it quickly.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is critical for managing barbiturate toxicity, guiding dose adjustments, and ensuring patient safety—especially in cases of accidental or intentional overdose. It helps prevent complications like respiratory depression or seizures.

Short name

Secobarbital Level

Frequently asked questions

How long does it take to get my results back?
Results are usually available within 1–3 business days, depending on lab processing times. Your doctor will contact you once they’re ready.
Can I drink alcohol before this test?
Avoid alcohol for 24 hours before testing, as it may affect drug metabolism and interfere with results. Always follow your provider’s specific instructions.
Is this test covered by insurance?
Check with your insurance provider to confirm coverage, as results may vary. Some plans require prior authorization for certain medications or monitoring tests.
  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