Primidone concentration in serum/plasma
This test measures the amount of primidone, a medication used to control seizures, in your blood. Primidone helps manage epilepsy by reducing abnormal electrical activity in the brain.
["Primidone levels help doctors ensure you’re taking the right dose for your condition."]
Key facts at a glance
- LOINC
- 12387-7
- Short code
- Primidone Ur-mCnc
- Synonyms
- Primidone Ur-mCnc
- Category
- chemistry
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 10 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Matters
Primidone is a medication often prescribed for epilepsy or other seizure disorders. Your doctor may order this test to check if your blood levels are within the safe range, preventing side effects like drowsiness or dizziness while ensuring it works effectively. Too little may mean seizures aren’t controlled, while too much could cause toxicity.
What to Expect Before the Test
No special preparation is usually needed. You may have a small needle inserted into your arm or vein to draw blood. If you’re on other medications, let your healthcare provider know—some drugs can affect primidone levels.
How the Test Works
Blood is collected and analyzed using a lab method called immunoassay (IA) or chemiluminescent immunoassay (CLIA), which detects primidone molecules in your serum or plasma. Results are reported as a mass concentration (in micrograms per milliliter, µg/mL).
What the Results Mean
Your results will show your primidone blood level. Your doctor will compare this to your treatment plan to adjust your dose if needed. Typical ranges vary by age, health, and other medications, so your doctor will interpret results based on your specific situation.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Primidone levels are critical for managing epilepsy. Low levels may indicate insufficient medication, increasing seizure risk, while high levels can cause side effects like nausea, fatigue, or rare but serious liver issues. Regular monitoring helps balance effectiveness and safety.
Short name
Primidone Level
Frequently asked questions
How often should I get this test?
What if my test results are outside the normal range?
Can diet or other medications affect this test?
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