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24-Hour Urine Fenetylline Concentration (Total)

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

This test measures the total amount of fenetylline, a metabolite of phencyclidine (PCP), in your urine over a 24-hour period. It helps assess exposure to PCP or related compounds over time.

Quick summary

["This test helps evaluate drug metabolism and potential exposure to certain psychoactive substances."]

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

Key facts at a glance

LOINC
3629-3
Short code
Fenetylline 24h Ur-mRate
Synonyms
Fenetylline 24h Ur-mRate
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Ref low
20
Ref high
400
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82670
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 Is Done

Your healthcare provider may order this test if you’ve been exposed to phencyclidine (PCP) or other drugs that produce fenetylline as a metabolite. It can also be used in research or specialized clinical settings to monitor drug metabolism patterns.

What to Expect Before the Test

You’ll need to collect all urine for a full 24-hour period, typically starting after a void at midnight. Collect samples in a refrigerator or at room temperature, and return them to your provider or lab within the specified timeframe.

What to Expect During the Test

No special preparation is needed beyond collecting urine samples. The lab processes the combined sample to measure fenetylline levels.

What the Results Mean

Results are qualitative (positive/negative) rather than quantitative, indicating whether detectable amounts of fenetylline were present in your urine over 24 hours. High levels may suggest recent exposure or prolonged presence of PCP-related compounds.

Reference range

Premenopausal: 20-400 pg/mL; Postmenopausal: <30 pg/mLN/A

Specimen: urine

No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Fenetylline Urine Rate

Frequently asked questions

What does a positive result mean?
A positive result means detectable amounts of fenetylline were found in your urine over 24 hours. This could suggest exposure to phencyclidine or similar substances, but it does not confirm the exact source or timing of exposure.
How is this test different from a blood test?
This test measures fenetylline in urine, which reflects longer-term exposure and metabolism over 24 hours. A blood test would show more immediate levels of the drug or its metabolites.
Can I drink alcohol before this test?
Alcohol is not restricted, but avoid excessive intake that might alter urine composition. Follow your provider’s specific instructions for sample collection.
  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