Amphetaminesmsmtgast
This test measures the amount of amphetamines in stomach fluid to help detect drug exposure or poisoning.
{"Measures amphetamine-type drugs in stomach fluid","Used to diagnose accidental or intentional drug overdose","Helps healthcare providers determine appropriate treatment","Results are typically available within a few days","The test is ordered when someone shows symptoms of amphetamine poisoning"}
Key facts at a glance
- LOINC
- 109845-8
- Short code
- Amphetamines Msmt Gast
- Synonyms
- Amphetamines Msmt Gast
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Critical range
- — – 500 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 84484
- SNOMED
- 302774002
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What is this test?
The Amphetamines test in Gastric Fluid is a laboratory test that measures the concentration of amphetamine-type drugs in a sample of fluid from the stomach (gastric fluid). Amphetamines are stimulant drugs that affect the central nervous system and include both illegal substances (like methamphetamine) and prescription medications (like those used for ADHD).
How is the test performed?
A healthcare provider collects a sample of gastric fluid, usually through a nasogastric tube (a tube passed through the nose into the stomach) or during an endoscopy. The sample is then sent to a laboratory where it is analyzed using specialized equipment to detect and measure amphetamine compounds.
Why might I need this test?
This test may be ordered if you have symptoms of amphetamine intoxication or overdose, such as agitation, rapid heartbeat, high blood pressure, dilated pupils, or confusion. It may also be used in emergency situations to help identify the cause of unexplained symptoms or to guide treatment decisions.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings2
Frequently asked questions
Is the test painful?
How long does it take to get results?
What do the results mean?
Do I need to prepare for the test?
Sources
- 1
- 2
- 3
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 17, 2026. · Read our editorial policy