Tramadol/Creatinine Ratio, Urine
A urine test that measures tramadol relative to creatinine. It may help assess recent tramadol exposure or monitor prescribed use.
["This test can help evaluate tramadol exposure, but timing, hydration, kidney function, and medication changes affect the result."]
Key facts at a glance
- LOINC
- 58404-5
- Short code
- traMADol/Creat Ur
- Synonyms
- traMADol/Creat Ur
- Category
- kidney
- Sample
- urine
- Container
- Sterile urine container
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- 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 urine test measures the amount of tramadol in a sample compared with the amount of creatinine. Creatinine is a waste product produced by the muscles and is commonly used to help account for how concentrated a urine sample is.
Why might I need this test?
A clinician may order this test to monitor tramadol treatment, confirm suspected exposure, or evaluate concern about too much medication or misuse. It may also be used as part of routine drug testing when clinically appropriate.
How is the test performed?
You provide a urine sample, and the laboratory measures tramadol and creatinine. The laboratory then calculates the tramadol-to-creatinine ratio. The sample is usually collected once or as directed by the ordering clinician.
How do I prepare for the test?
Follow the collection instructions provided by the clinic or laboratory. Tell the clinician when you last took tramadol and report other medications or supplements you use. Do not change your dose or stop treatment without medical advice.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
A higher tramadol-to-creatinine ratio may be associated with greater or more recent tramadol exposure, but it does not by itself prove misuse, toxicity, or impaired driving. A lower result may reflect lower exposure, later testing after a dose, or differences in urine concentration. Results should be interpreted with the timing of the last dose, kidney function, hydration, and the clinical situation.
Short name
Urine tramadol/creatinine ratio
Frequently asked questions
Does this test show how much tramadol is in my body?
Can hydration affect the result?
Will a positive result mean I am taking too much tramadol?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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