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Amphetaminesstlqlscn

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

This test checks if amphetamine-type stimulant drugs are present in a stool sample.

Quick summary

{"Detects amphetamines (e.g., methamphetamine, MDMA) in stool","Used to screen for drug abuse or exposure","Results are preliminary and require confirmation testing"}

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

Key facts at a glance

LOINC
18431-7
Short code
Amphetamines Stl Ql Scn
Synonyms
Amphetamines Stl Ql Scn
Category
chemistry
Sample
stool
Container
Clean container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
screen
Specimen volume
5 g
Stability
Refrigerated: 24h, Frozen: 7d
TAT
4–24 hours
Order
routine

What is this test?

The Amphetamine Screening Test is a laboratory test that detects the presence of amphetamine-type stimulants in your stool (feces). Amphetamines include drugs like methamphetamine (meth), MDMA (ecstasy), and other stimulant medications. This test uses a screening method to quickly identify if these substances may be present in your body.

Why do I need this test?

Your healthcare provider may order this test if they suspect amphetamine use or exposure. Reasons may include: monitoring patients in substance abuse treatment, evaluating unexplained symptoms, pre-employment or legal testing, or checking for drug exposure in children.

How is the test performed?

A stool sample is collected using a special container provided by the laboratory. The sample is then analyzed using immunoassay screening methods that can detect the presence of amphetamine compounds. If the screening test is positive, confirmatory testing is typically performed using more specific methods like gas chromatography-mass spectrometry (GC-MS).

Understanding your results

A negative result means no amphetamines were detected in your stool sample at the time of testing. A positive result indicates that amphetamines may be present, but screening tests can sometimes produce false positives. Any positive screening result should be confirmed with additional testing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

What drugs does this test detect?
This test detects amphetamine-type stimulants including methamphetamine, MDMA (ecstasy), amphetamine, dextroamphetamine, and some prescription ADHD medications.
Do I need to prepare for this test?
No special preparation is typically needed. Your healthcare provider will give you a collection container and instructions for obtaining a stool sample.
Can a positive result be wrong?
Yes, screening tests can sometimes show false positive results due to cross-reactivity with other substances or medications. Positive screening results should always be confirmed with more specific testing methods.
How long do amphetamines stay detectable in stool?
Amphetamines can typically be detected in stool for 2-4 days after use, depending on the specific drug, dosage, and individual metabolism.
Will my results be kept confidential?
Test results are part of your protected medical record. Healthcare providers follow strict privacy laws (HIPAA) regarding the handling and disclosure of your health information.
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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