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Gabapentin Concentration in Serum

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 ensure your dose is effective and safe."]

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

Key facts at a glance

LOINC
32589-4
Short code
Gabapentin Dose
Synonyms
Gabapentin Dose
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 Matters

Your doctor may order this test if you’re taking gabapentin to check if your dose is working properly or if you’re experiencing side effects. It helps prevent too much or too little medication in your system.

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 a blood sample. The process is quick and usually painless.

What the Test Results Mean

Results are used to guide your treatment plan. If levels are too high, your doctor may adjust your dose. If levels are too low, they may increase your medication.

Common Reasons for Testing

Doctors may test gabapentin levels if you’re experiencing unusual side effects, if your seizures or pain aren’t controlled, or if you’re switching medications.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Gabapentin Level

Frequently asked questions

How often should I get this test?
Your doctor will determine the timing based on your treatment plan, but it’s often done 1–2 hours after taking your dose to check blood levels accurately.
What are typical side effects of gabapentin?
Common side effects include dizziness, drowsiness, or nausea. If you experience severe symptoms like trouble breathing or irregular heartbeat, seek medical help immediately.
Can I drink alcohol while taking gabapentin?
No, alcohol can increase drowsiness and interfere with gabapentin’s effectiveness. Always follow your doctor’s instructions about alcohol consumption.
  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