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Venlafaxine and Creatinine, Urine

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

This urine test measures venlafaxine and creatinine. Creatinine indicates urine concentration, helping interpret the venlafaxine result.

Quick summary

["The test can help assess urine venlafaxine levels while accounting for how concentrated the urine sample is."]

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

Key facts at a glance

LOINC
72775-0
Short code
Venlafaxine/Creat Ur
Synonyms
Venlafaxine/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 venlafaxine, an antidepressant, in your urine. It also measures creatinine, a waste product commonly used to assess how concentrated a urine sample is.

Why might I need this test?

A clinician may order this test to help evaluate venlafaxine exposure, medication adherence, or possible toxicity. It may also be used as part of routine drug monitoring, particularly when symptoms or side effects raise concern about the medication level.

How is the test performed?

A urine sample is collected and analyzed in a laboratory. The laboratory reports the venlafaxine result and may use the creatinine measurement to adjust for differences in urine concentration. Collection timing can affect the result because medication levels change over time.

How do I prepare for the test?

Follow your clinician's instructions about when and how to collect the urine. Do not change your venlafaxine dose or skip doses unless your clinician tells you to, and tell the laboratory about other medicines or supplements you take.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings2

Short name

Urine venlafaxine

Frequently asked questions

What does urine creatinine tell the clinician?
Creatinine is used as a marker of urine concentration. It helps determine whether a low venlafaxine result may be influenced by a very dilute urine sample.
Does the timing of my venlafaxine dose affect the result?
Yes. Urine venlafaxine levels can change depending on when the sample is collected relative to your dose, so follow any collection-time instructions carefully.
What if my venlafaxine result is unexpected?
Your clinician will consider the result along with your dose, collection time, symptoms, and laboratory method. Do not change your medication without medical guidance.
  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