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Urinary pentyluracil mass concentration (24-hour collection)

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

This test measures the amount of pentyluracil, a metabolite of certain drugs or chemicals, in your urine over a 24-hour period. It may be used to monitor exposure or metabolism in specific clinical scenarios.

Quick summary

["This test helps track levels of a drug or chemical metabolite in your urine over a full day."]

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

Key facts at a glance

LOINC
78841-4
Short code
JWH-122 5OH-pentyl Ur Cfm-mCnc
Synonyms
JWH-122 5OH-pentyl Ur Cfm-mCnc
Category
chemistry
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

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if they suspect you’ve been exposed to certain substances (like drugs, toxins, or environmental chemicals) or if you’re undergoing treatment requiring monitoring of metabolite levels. It could also be part of a broader evaluation for metabolic or toxicological conditions.

What to Expect Before the Test

You’ll need to collect all urine produced in a 24-hour period (typically from one morning to the next morning) in a special container. Follow your provider’s instructions carefully to ensure accurate results. Avoid certain foods, medications, or activities that might interfere with the test.

How the Test Works

The collected urine sample is analyzed using a specialized laboratory technique (likely high-performance liquid chromatography or a similar method) to measure the mass concentration of pentyluracil. This helps determine how much of the substance was present in your body over the monitored period.

What the Results Mean

Results may indicate normal exposure levels, potential drug/toxin metabolism patterns, or abnormal accumulation that could signal underlying health concerns. Your provider will interpret the results in the context of your medical history and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Interpretation and Use

Short name

24-Hour Urine Pentyluracil

Frequently asked questions

What does a high or low result mean?
High levels of pentyluracil in urine could suggest recent exposure to certain drugs, toxins, or metabolic imbalances. Low levels may indicate normal metabolism or reduced exposure. Always discuss results with your healthcare provider, as they’ll consider your full clinical picture.
How often is this test repeated?
This test is typically performed once for a 24-hour collection unless your provider orders repeat testing for ongoing monitoring (e.g., during treatment for a specific condition). Follow their guidance for follow-up.
Can I drink water during the test?
Yes, you can drink water as needed unless your provider specifies otherwise. Avoid excessive fluids that might dilute the sample, as this could affect accuracy. Stick to the full 24-hour collection period.
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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