: Levetiracetam, Serum or Plasma, Mass Concentration Measurement
: This test measures the amount of levetiracetam, an anti-seizure medication, in a sample of serum or plasma. It helps your care team confirm that your dose is in an appropriate range for you.
[": A levetiracetam level helps guide dosing so the medication works effectively while limiting side effects."]
Key facts at a glance
- LOINC
- 30471-7
- Short code
- levETIRAcetam SerPl-mCnc
- Synonyms
- levETIRAcetam SerPl-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
: What Is Levetiracetam?
: Levetiracetam is a prescription medication used to help control certain types of seizures. It is taken regularly, and the amount in your blood can vary based on your dose, how your body processes the drug, and other medications you take.
: Why Your Clinician May Order This Test
: Your clinician may check a levetiracetam level if seizures are not well controlled, if you have side effects, or if there is concern that another medicine or a health change is affecting how your body handles the drug. It can also be used to confirm that your dose is appropriate.
: How the Sample Is Collected
: A small blood sample is drawn, usually from a vein in your arm, and the serum or plasma is separated for testing. Timing can matter, so follow any instructions from your care team about when to take your dose relative to the blood draw.
: What the Results Mean
: Results are reported as a concentration of levetiracetam in your blood. Your clinician interprets the number together with your dose, the timing of the draw, your symptoms, kidney function, and other factors. A result outside a typical range does not automatically mean something is wrong.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
: Levetiracetam levels support individualized dosing for seizure control. Because levetiracetam is cleared partly by the kidneys, kidney function and interactions with other medications can affect blood concentrations. Results should always be interpreted by your clinician in the context of your overall care rather than as a stand-alone diagnosis.
Short name
: Levetiracetam Level
Frequently asked questions
: Do I need to fast before this test?
: Can I adjust my medication based on the result?
: What if my level is outside the usual range?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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