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Serum or plasma concentration of gabapentin (anticonvulsant drug level)

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

This test measures the amount of gabapentin in your blood to check if your dose is working properly.

Quick summary

["Gabapentin levels help ensure your medication is at the right strength for your condition."]

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

Key facts at a glance

LOINC
73015-0
Short code
Gabapentin (neut) IgM SerPl Ql FC
Synonyms
Gabapentin (neut) IgM SerPl Ql FC
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
82784
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 healthcare provider may order this test if you’re taking gabapentin for seizures, nerve pain, or other conditions. It helps monitor whether your dose is effective and if you’re experiencing side effects.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or vein to draw blood. The process usually takes a few minutes.

What the Results Mean

Results help determine if your gabapentin levels are within the target range for your condition. Too little may mean your symptoms aren’t controlled, while too much could cause side effects like dizziness or drowsiness.

Common Reasons for Testing

This test is often done if you’re new to gabapentin, if your symptoms change, or if you’re adjusting your dose. It may also be checked if you’re experiencing unusual side effects.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Monitoring Therapeutic Efficacy and Safety

Short name

Gabapentin Level

Frequently asked questions

What does a low gabapentin level mean?
A low level might indicate your medication isn’t providing enough relief for your symptoms, such as seizures or nerve pain. Your provider may adjust your dose upward.
What does a high gabapentin level mean?
High levels could suggest overdose or improper metabolism, leading to side effects like dizziness, confusion, or fatigue. Your provider may reduce your dose or investigate other causes.
How often should I get this test?
Your provider will determine the frequency based on your treatment plan, but it’s often done every few weeks or months to check for optimal dosing.
  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