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Ketoprofen/Creatinine Ratio, Urine

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

A urine test that measures ketoprofen relative to creatinine, helping assess drug excretion while accounting for differences in urine concentration.

Quick summary

["This test helps determine how much ketoprofen is being excreted in urine."]

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

Key facts at a glance

LOINC
87783-7
Short code
Ketoprofen/Creat Ur Cfm
Synonyms
Ketoprofen/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?

Ketoprofen is a nonsteroidal anti-inflammatory drug used to relieve pain and inflammation. This test measures ketoprofen in urine along with creatinine, a waste product made by the muscles, so the drug amount can be interpreted in relation to urine concentration.

Why might I need this test?

A clinician may use this test to assess recent ketoprofen exposure, medication use, drug clearance, or possible effects on kidney function. The result is most meaningful when the urine collection time and the timing of the last dose are known.

How is the test performed?

Urine is collected as directed by your clinician, either as a single sample or over a specified period. The laboratory measures ketoprofen and creatinine and may calculate their ratio.

How do I prepare for the test?

Follow the collection instructions exactly, including any specified collection time or duration. Record when you last took ketoprofen and do not change your dose unless your clinician tells you to.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

A higher urine result may reflect a recent dose, higher dosing, or reduced drug clearance, while a lower result may reflect limited or recent exposure. Interpretation also depends on kidney function, urine concentration, and the timing of collection. Your clinician should interpret the result together with your symptoms, medication history, and other tests.

Short name

Urine ketoprofen/creatinine

Frequently asked questions

Is this the same as a routine blood drug level?
No. This test measures ketoprofen and creatinine in urine, so it reflects urinary drug excretion rather than the concentration in blood at a particular moment.
Why is creatinine included?
Creatinine helps account for how concentrated the urine is. This makes it easier to compare ketoprofen amounts between samples or collection periods.
What if my urine result is abnormal?
An abnormal result may be influenced by the dose, when the urine was collected, kidney function, or urine concentration. Your clinician can determine whether any change in treatment is needed.
  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