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Serum/plasma concentration of oxcarbazepine (anticonvulsant medication)

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

This test measures the amount of oxcarbazepine, a medication used to control seizures, in your blood. It helps your healthcare provider check if the dose is working properly.

Quick summary

["This test ensures your seizure medication levels are safe and effective."]

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

Key facts at a glance

LOINC
73224-8
Short code
OXcarbazepine ind plt IgG SerPl Ql FC
Synonyms
OXcarbazepine ind plt IgG 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 Is Done

Your doctor may order this test if you’re taking oxcarbazepine to manage seizures. It helps monitor whether your medication is at an appropriate level to prevent seizures without causing side effects. This is especially important if you’re on a specific dose or if your condition changes.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or hand to draw blood. If you’re on a long-term medication like oxcarbazepine, your doctor may schedule this test at regular intervals to track your levels.

How the Test Works

Blood is drawn from a vein in your arm. The sample is then tested using a sensitive method to measure the exact amount of oxcarbazepine in your blood plasma or serum.

What the Results Mean

Results help your healthcare provider determine if your dose is too high or too low. They may adjust your medication based on these findings to balance effectiveness and safety.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Oxcarbazepine Level

Frequently asked questions

What could cause abnormal results?
Abnormally high levels may indicate your body isn’t processing the medication well, or you may have taken too much. Low levels could mean your dose isn’t working as intended. Other factors, like liver or kidney issues, could also affect how your body handles oxcarbazepine.
How often should I get this test?
Your doctor will decide how often you need this test based on your treatment plan, how long you’ve been on the medication, and whether you have any health conditions that might change your levels. Follow their advice closely.
Can I eat or drink before the test?
You can eat and drink normally before the test, unless your doctor specifies otherwise. Avoiding food or fluids for a set period is not required for this test.
  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