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Gabapentin Concentration in Serum or Plasma

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

This test measures the amount of gabapentin, a medication used to treat certain types of seizures or nerve pain, in your blood.

Quick summary

["Knowing your gabapentin levels helps doctors monitor your dose for optimal effectiveness and safety."]

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

Key facts at a glance

LOINC
16884-9
Short code
Deprecated GABA Plas Ql
Synonyms
Deprecated GABA Plas Ql
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 Might Be Ordered

Your healthcare provider may request this test if you’re taking gabapentin to check if your dose is working properly, adjust it if needed, or detect potential side effects like toxicity.

How the Test Works

A small blood sample is taken, and lab tests detect gabapentin using a sensitive immunoassay method to measure its concentration in your bloodstream.

What to Expect Before the Test

No special preparation is usually needed, but inform your doctor about any other medications you’re taking, as they may affect results.

Possible Results and Interpretation

Results are compared to a general reference range to assess whether your gabapentin levels are therapeutic (effective) or outside safe limits.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Gabapentin levels help identify whether your medication is working as intended, preventing overdose or underdosing, especially in patients with kidney issues or those taking other drugs that interact with gabapentin.

Short name

Gabapentin Level

Frequently asked questions

What does a high gabapentin level mean?
High levels may indicate overdose, kidney problems, or improper dosing. Your doctor will review your symptoms and other test results to guide next steps.
What does a low gabapentin level mean?
Low levels might mean your dose isn’t sufficient to control seizures or pain. Your doctor may adjust your medication or check for other health factors affecting absorption.
Does diet or food affect gabapentin test results?
Diet generally doesn’t interfere with gabapentin blood tests, but if you’re taking it with food, note this for consistency in results. Always follow your doctor’s instructions.
  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