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Mass fraction of methamphetamine in urine (24-hour collection)

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

This test measures the total amount of methamphetamine present in your urine over a 24-hour period. It helps track drug use and monitor treatment progress.

Quick summary

["This test checks for methamphetamine exposure over time, useful for addiction management and recovery tracking."]

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

Key facts at a glance

LOINC
31026-8
Short code
D-methamphet MFr Ur
Synonyms
D-methamphet MFr Ur
Category
chemistry
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

Why This Test Is Done

Your healthcare provider may order this test if you’re undergoing treatment for methamphetamine addiction, managing suspected exposure, or evaluating compliance with a drug-free program. It helps assess whether methamphetamine has been present in your system during the past day.

What to Expect Before the Test

You’ll collect your urine in a sterile container throughout the day, starting right after waking up and ending just before bedtime. Follow your provider’s instructions carefully to ensure accurate results.

How the Test Works

The collected urine is analyzed to determine the total amount of methamphetamine present, measured as a fraction of the total urine volume. This provides an overall picture of exposure rather than just a single snapshot.

What the Results Mean

Results are typically reported as a mass fraction (e.g., parts per million or micrograms per milliliter). A positive result indicates methamphetamine was detected in your urine during the 24-hour period. Interpretation depends on clinical context, such as treatment goals or suspected exposure.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

24-Hour Methamphetamine Urine Test

Frequently asked questions

What does a positive result mean?
A positive result means methamphetamine was found in your urine during the 24-hour period. This could indicate recent use, ongoing exposure, or non-compliance with a drug-free program. Your healthcare provider will discuss next steps based on your specific situation.
Can I drink alcohol before this test?
Alcohol itself won’t affect this test, but it’s important to follow all instructions from your provider. Some medications or substances may interfere with urine collection or testing accuracy, so discuss this with them beforehand.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your provider will contact you once they’re ready, so check in with them if you haven’t heard back sooner.
  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