Amphetaminesstlqlscn
This test checks if amphetamine-type stimulant drugs are present in a stool sample.
{"Detects amphetamines (e.g., methamphetamine, MDMA) in stool","Used to screen for drug abuse or exposure","Results are preliminary and require confirmation testing"}
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?
Do I need to prepare for this test?
Can a positive result be wrong?
How long do amphetamines stay detectable in stool?
Will my results be kept confidential?
Sources
- 1
- 2
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.
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