Gabapentin in Plasma (Mass Concentration)
This test measures the amount of gabapentin, a medication used to treat certain types of seizures or nerve pain, in your blood plasma.
["Knowing your gabapentin levels helps your doctor monitor your dose and ensure it’s working safely."]
Key facts at a glance
- LOINC
- 16885-6
- Short code
- Deprecated GABA Plas-mCnc
- Synonyms
- Deprecated GABA Plas-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
Why This Test Is Done
Your doctor may order this test if you’re taking gabapentin to check if your dose is appropriate. It can help identify whether your medication is at a safe level or if adjustments are needed, especially if you experience side effects like dizziness, fatigue, or unusual drowsiness.
How the Test Works
A blood sample is taken from a vein in your arm. The lab uses a specialized method to measure the exact amount of gabapentin in your plasma. This helps determine whether your medication concentration is within the target range for your condition.
What to Expect Before the Test
There are usually no special preparations needed. You may have a small bandage on the site where the blood is drawn, and you might feel a slight pinch. If you’re on blood thinners or have a history of bleeding issues, let your doctor know before the test.
What to Expect During the Test
The blood sample is collected quickly and painlessly. You’ll likely feel a brief pinch, but most people tolerate it well. The test itself takes only a few minutes, and you can return to your normal activities afterward.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Gabapentin levels can vary based on how your body processes the medication, your dose, and other health factors. Low levels may indicate your dose isn’t working effectively, while high levels could signal toxicity or improper absorption. Your doctor will use these results to adjust your treatment plan if needed, especially in cases of overdose, poor compliance, or side effects.
Short name
Gabapentin Level
Frequently asked questions
Why might my doctor order this test?
What do my gabapentin levels mean?
Can I eat or drink before 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