Skip to content

Oxcarbazepine concentration in serum/plasma

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

This test measures the amount of oxcarbazepine, a medication used to treat certain types of seizures, in your blood.

Quick summary

["Helps ensure your dose is effective and safe."]

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

Key facts at a glance

LOINC
73225-5
Short code
OXcarbazepine ind plt IgM SerPl Ql FC
Synonyms
OXcarbazepine ind plt IgM SerPl Ql FC
Category
hematology
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
82784
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 Matters

Your doctor may order this test if you’re taking oxcarbazepine to manage epilepsy or nerve pain. It helps confirm whether the medication is working as intended and checks for potential side effects, such as low blood sodium levels.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into a vein (usually in your arm) to draw a blood sample. The process takes about 5 minutes, and you may feel a brief pinch.

What the Results Mean

Results are used to guide your treatment. Low levels may mean your dose isn’t high enough, while high levels could signal toxicity or improper metabolism. Your doctor will discuss these findings with you.

Common Reasons for Testing

Doctors may check oxcarbazepine levels if you’re starting the medication, adjusting your dose, experiencing side effects, or if you have kidney issues, which can affect how your body processes it.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Oxcarbazepine is metabolized in the liver and kidneys. Regular monitoring helps prevent side effects like dizziness, drowsiness, or hyponatremia (low sodium in the blood). It also ensures the medication remains effective over time.

Short name

Oxcarbazepine Level

Frequently asked questions

Why might my doctor want to check my oxcarbazepine levels frequently?
If you have kidney disease, take other medications that interact with oxcarbazepine, or if you’re experiencing unusual side effects like confusion, nausea, or fatigue, your doctor may order more frequent tests to adjust your dose safely.
What if my test results are outside the usual range?
Your doctor will review the results with you and may change your medication dose, dosage schedule, or recommend additional tests. Never alter your medication without professional guidance.
How long does it take to get my test results?
Results are typically available within 1–3 business days, depending on your lab. Your doctor will contact you once they’re ready for discussion.
  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