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Levetiracetam in Serum or Plasma (Quantitative)

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

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

Quick summary

["Knowing your levetiracetam levels helps doctors monitor your seizure control and adjust your dose safely."]

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

Key facts at a glance

LOINC
73006-9
Short code
levETIRAcetam (neut) IgG SerPl Ql FC
Synonyms
levETIRAcetam (neut) IgG SerPl Ql FC
Category
chemistry
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 to check if your seizure medication is working properly. It helps ensure you’re taking the right amount and to avoid potential side effects.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or vein to draw blood. If you’re taking levetiracetam, it’s best to check with your doctor before fasting, as it may affect results.

What the Test Results Mean

Results help your doctor determine if your seizure control is adequate. Abnormally high or low levels might indicate issues like poor absorption, drug interactions, or ineffective dosing.

Possible Side Effects or Considerations

Levetiracetam is generally well-tolerated, but very high levels could cause dizziness, confusion, or fatigue. Always follow your doctor’s instructions for managing your medication.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Levetiracetam Level

Frequently asked questions

What questions might you have about this test?
This test is primarily used to monitor therapeutic drug levels for seizure management. It helps prevent both underdosing (which may lead to seizures) and overdosing (which could cause unwanted side effects).
How often will I need this test?
Your doctor will decide based on your treatment plan. Some patients may need regular monitoring, while others may only need it occasionally.
Can I eat or drink before the test?
Generally, no fasting is required unless your doctor specifies otherwise. However, always confirm with your healthcare provider, especially if you’re taking other medications that might affect bloodwork.
  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