Amphetamine Urine Test: What It Is, How It Works, and What Your Results Mean

What is an amphetamine urine test and why might my doctor order it for me?

The Amphetamines Urine Drug Test is a screening test that detects the presence of amphetamine-type stimulant drugs in your urine. Amphetamines include illegal drugs like methamphetamine (speed, crystal meth) and prescription medications such as Adderall, Dexedrine, and some ADHD medications. This test uses the SAMHSA (Substance Abuse and Mental Health Services Administration) standardized method, which is the same protocol used for federally-mandated workplace drug testing in the United States.

How is the amphetamine urine test performed, and do I need to do anything to prepare?

You will be asked to provide a urine sample in a clean container. The collection process is similar to a routine urine test. For workplace or legal testing, the collection may be observed to ensure sample integrity. The sample is then sent to a laboratory where it is analyzed using immunoassay techniques to detect amphetamine compounds. If the initial screen is positive, a confirmatory test (GC-MS or LC-MS/MS) is typically performed to verify the result.

How long do amphetamines stay in urine after the last time they were used?

Amphetamines can typically be detected in urine for 1-4 days after use, depending on factors such as the specific drug, dosage, frequency of use, individual metabolism, body mass, and kidney function. Chronic or heavy use may result in longer detection windows.

What do my amphetamine urine test results mean if they come back positive or negative?

A 'negative' result means no amphetamines were detected at or above the testing threshold. A 'positive' result indicates that amphetamines were detected and requires confirmatory testing. It's important to note that certain prescription medications (such as ADHD medications) and some over-the-counter drugs may cause a positive result. Always disclose all medications you are taking to the testing facility.