Paroxetine and Creatinine, Urine
Measures paroxetine in urine along with creatinine, which can help account for urine dilution when interpreting drug levels.
["This test can help clinicians evaluate paroxetine exposure and whether urine concentration may affect the result."]
Key facts at a glance
- LOINC
- 72785-9
- Short code
- PARoxetine/Creat Ur
- Synonyms
- PARoxetine/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 test measures the amount of paroxetine, an antidepressant medicine, in a urine sample. Creatinine is measured at the same time to help assess how concentrated the urine is.
Why might I need this test?
A clinician may order it to monitor paroxetine exposure, check medication adherence, or investigate possible effects of drug interactions or reduced drug clearance. The result is interpreted together with dose, timing, symptoms, and other clinical information.
How is the test performed?
A urine specimen is collected and analyzed by the laboratory to determine the paroxetine and creatinine amounts. Depending on the laboratory method, the results may be reported individually or as a urine paroxetine-to-creatinine ratio.
How do I prepare for the test?
Follow the collection instructions provided by the laboratory, including whether a first-morning or timed urine sample is required. Record when you last took paroxetine, and do not change or stop your medication without discussing it with your clinician.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
A higher urine paroxetine result may reflect recent dosing, accumulation, reduced medication clearance, or an interaction with another medicine. A lower result may occur when a dose was missed or the specimen was collected a long time after dosing. Urine creatinine helps clinicians consider how dilute or concentrated the specimen is, but results should not be interpreted in isolation.
Short name
Urine paroxetine and creatinine
Frequently asked questions
Does this test show whether paroxetine is working?
Why is creatinine measured with urine paroxetine?
Can I take paroxetine before providing the urine sample?
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