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Topiramate and Creatinine, Urine — Confirmatory Test

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

Measures topiramate and creatinine in urine to help verify medication exposure and account for urine concentration.

Quick summary

["This urine test can confirm whether topiramate is present in the body."]

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

Key facts at a glance

LOINC
87770-4
Short code
Topiramate/Creat Ur Cfm
Synonyms
Topiramate/Creat Ur Cfm
Category
kidney
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
confirm
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

What is this test?

This test measures topiramate, an antiseizure medicine, and creatinine in a urine sample. Creatinine is a waste product that can help account for differences in urine concentration.

Why might I need this test?

This test may be used to confirm medication use or exposure, support therapeutic drug monitoring, or verify an earlier screening result. It may be ordered when there is concern about missed doses, medication diversion, or unexpected medication levels.

How is the test performed?

A urine sample is collected and analyzed in a laboratory. The laboratory may report topiramate and creatinine separately or normalize the topiramate amount to creatinine, depending on the specific test method.

How do I prepare for the test?

Follow the laboratory's urine collection instructions and tell the care team when you last took topiramate. Do not change or stop your medication unless your clinician advises you to do so.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Urine topiramate and creatinine

Frequently asked questions

Does this test show how much topiramate is in my blood?
No. This is a urine test, so it shows topiramate present in the urine rather than the exact concentration in your blood.
Why is creatinine measured with topiramate?
Urine can vary in how dilute or concentrated it is. Creatinine may be used to help normalize the topiramate result for more meaningful comparison.
Can I take my topiramate before collecting the urine?
Usually you should continue your medication as prescribed unless your clinician gives different instructions. Record the date and time of your last dose because it can help the clinician interpret the result.
  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