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Valproate Level (Serum)

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

This test measures the amount of valproate, a medication used to control seizures or mood disorders, in your blood. It helps doctors monitor your dose to ensure it’s effective and safe.

Quick summary

["Valproate levels help prevent toxicity while maximizing treatment benefits."]

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

Key facts at a glance

LOINC
73919-3
Short code
MAM-2201 pentanoate Bld Ql
Synonyms
MAM-2201 pentanoate Bld Ql
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Matters

Valproate is prescribed to manage conditions like epilepsy, bipolar disorder, or migraine. Your doctor may order this test to check if your medication is working properly and to avoid dangerous levels that could cause 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 on valproate, your doctor will discuss timing (e.g., before or after doses) to get the most accurate result.

How the Test Works

Blood is collected and sent to a lab where it’s analyzed using a sensitive method (likely immunoassay or chromatography) to measure valproate concentration. Results are reported in micrograms per milliliter (mcg/mL).

What the Results Mean

Results help your doctor adjust your dose if needed. Very high or very low levels may indicate issues like poor absorption, liver problems, or incorrect dosing. Always discuss results with your provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Valproate Levels and Health

Short name

Valproic Acid Blood Level

Frequently asked questions

Why might my doctor check valproate levels?
Your doctor may order this test if you’re newly started on valproate, have trouble controlling seizures or mood swings, or if you’re experiencing side effects like nausea, dizziness, or unusual fatigue. It’s also checked in children or older adults who may be more sensitive to medication effects.
What happens if my valproate level is too high?
High levels can cause serious side effects like tremors, confusion, or even liver damage. Your doctor will adjust your dose or switch medications if needed. Never stop taking valproate without consulting them.
Can I eat or drink before this test?
Typically, you can eat and drink normally unless your doctor specifies otherwise. If you’re unsure, ask your lab or doctor about timing—some tests require fasting or specific timing around medication doses.
  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