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Urinary amphetamine and methamphetamine screening (qualitative)

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

This test checks for the presence of amphetamine or methamphetamine in your urine, substances commonly used in illegal drugs.

Quick summary

["Screening helps detect recent drug use for medical, legal, or workplace reasons."]

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

Key facts at a glance

LOINC
16367-5
Short code
Deprecated Amphet/Methamphet Ur
Synonyms
Deprecated Amphet/Methamphet 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 have symptoms of drug use, such as changes in behavior, sleep patterns, or appetite. It could also be part of a routine screening for employment, legal proceedings, or substance abuse evaluation.

What to Expect Before the Test

No special preparation is needed, but you may be asked to provide a clean-catch urine sample. Avoid alcohol or certain medications that could interfere with results for 24 hours before testing.

What the Test Results Mean

Positive results indicate the presence of amphetamine or methamphetamine in your urine. A negative result means these substances were not detected. Results are qualitative, so they only show presence or absence, not the amount.

Possible Causes of Positive Results

Positive results can occur from recent use of amphetamines or methamphetamines, either legally prescribed (e.g., ADHD medications) or illegally obtained. False positives can rarely occur due to exposure to other substances or certain medications.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Drug Screen (Urine)

Frequently asked questions

What does a positive result imply?
A positive result suggests recent drug use, which may require further evaluation by a healthcare provider to assess health risks, determine treatment options, or address underlying issues like substance abuse.
How soon after use can the drug be detected?
Drugs like amphetamines and methamphetamines can be detected in urine for several days after use, depending on the individual’s metabolism and the amount consumed. This test is designed to detect recent use, not long-term exposure.
Can over-the-counter medications affect this test?
Some medications, including certain cold or allergy remedies, may interfere with urine drug screening. Always inform your healthcare provider about all medications you are taking to avoid false results.
  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