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Amphetstlmcnt

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

A laboratory test that detects the presence of amphetamine drugs in a stool sample.

Quick summary

{"This test checks for amphetamine drugs (like methamphetamine or MDMA) in your stool","Stool sample collection is simple and non-invasive","Results help healthcare providers monitor drug use or treatment compliance","Positive results may indicate recent drug exposure","Certain foods and medications can affect test results"}

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

Key facts at a glance

LOINC
26791-4
Short code
Amphet Stl-mCnt
Synonyms
Amphet Stl-mCnt
Category
chemistry
Sample
stool
Container
Clean container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 g
Stability
Refrigerated: 24h, Frozen: 7d
TAT
4–24 hours
Order
routine

What is this test?

The Amphetamine test in stool is a laboratory analysis that detects the presence of amphetamine-type stimulants in your digestive system. Amphetamines are a class of stimulant drugs that include illegal substances like methamphetamine (meth) and MDMA (ecstasy), as well as some prescription medications used to treat ADHD (like Adderall) or narcolepsy. This test looks for traces of these drugs or their breakdown products (metabolites) in your stool sample.

Why might I need this test?

Your healthcare provider may order this test for several reasons: to screen for drug use, to monitor patients in substance abuse treatment programs, to check compliance with prescription medications, or in forensic or legal situations. Stool testing can detect drug use over a slightly longer window compared to urine testing for some substances.

How do I prepare for the test?

No special preparation is typically required for this test. However, it is important to inform your healthcare provider about all medications, supplements, and foods you have recently consumed, as some substances may interfere with test results. Certain prescription medications, over-the-counter drugs, and even some foods like poppy seeds may cause false positive results.

How is the sample collected?

A stool sample is collected in a clean, dry container. You will be given specific instructions by your healthcare provider or laboratory. The sample should be collected from a bowel movement and should not be contaminated with urine or water. The sample is then sent to a laboratory for analysis using specialized techniques to detect amphetamine compounds.

What do the results mean?

Results are typically reported as either positive (indicating amphetamines were detected) or negative (no amphetamines detected). A positive result means amphetamine substances were found in your stool sample. Your healthcare provider will interpret these results in the context of your medical history, symptoms, and the reason for testing. They may order additional tests to confirm results or determine the specific type of amphetamine present.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

How long do amphetamines stay detectable in stool?
Amphetamines can typically be detected in stool for 2-5 days after use, depending on the specific drug, dosage, and individual factors like metabolism and kidney function.
Can my diet affect the test results?
Certain foods may potentially affect test results. For example, poppy seeds contain small amounts of opium-related compounds. It is important to disclose all foods and supplements to your healthcare provider before the test.
Will prescription ADHD medications cause a positive result?
Yes, prescription amphetamine medications like Adderall, Dexedrine, or Vyvanse will cause a positive result on this test. Always inform your healthcare provider about all prescription medications you are taking.
Is the test confidential?
Laboratory test results are protected by privacy laws and are part of your confidential medical record. Results are only shared with authorized healthcare providers and may require your consent for release to other parties.
What happens if my test is positive?
If your test is positive, your healthcare provider will discuss the results with you. They may order confirmatory testing to identify the specific substance. The next steps depend on the reason for testing and your clinical situation.
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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