Detection windows · stimulant
Amphetamines & methamphetamine detection windows
The amphetamines class on the federal panel covers amphetamine, methamphetamine, MDMA and MDA. Immunoassay screens have a high false-positive rate; confirmation by mass spectrometry is essential, and MRO review accounts for prescriptions (e.g., legitimate ADHD medications).
Last updated:How long is Amphetamines & methamphetamine detectable?
Detection windows for Amphetamines & methamphetamine vary by specimen, use pattern, and individual factors. As approximate ranges: urine commonly covers a few days (longer in chronic users), oral fluid covers hours to about 48 hours, blood covers hours, and hair offers up to ~90 days after a ~7–10 day incorporation delay. Full matrix below — and see the interactive Explorer for cross-substance comparisons.
| Specimen | Window | Pattern | Caveat |
|---|---|---|---|
| Urine | 1–3 days | occasional | Urinary pH affects excretion of methamphetamine and amphetamine. |
| 3–5 days | chronic | Heavy use can extend the window modestly. | |
| Saliva | 1–48 hours | typical | Detects parent compound; window is short. |
| Blood | 1–48 hours | typical | Plasma half-life varies by isomer. |
| Hair | 7–90 days | typical | ~7–10 day incorporation delay. |
Ranges are approximate and vary by individual physiology, hydration, dose, frequency of use, and lab cutoff. They are not predictive of whether someone will "pass" a test.
About Amphetamines & methamphetamine
A group of phenethylamine stimulants. Federal panels test for amphetamine, methamphetamine, MDMA, and MDA. The d-/l-isomer ratio of methamphetamine helps confirmation labs distinguish illicit methamphetamine from over-the-counter Vicks-type l-methamphetamine.
Key analytes / metabolites detected
- Amphetamine (from methamphetamine)
- MDA (from MDMA)
Common cross-reactants (immunoassay-stage)
The following can affect screening immunoassay results and are typically resolved by mass-spectrometry confirmation and MRO review:
- Pseudoephedrine and other OTC decongestants
- Bupropion
- Selegiline (metabolized to methamphetamine)
- Ranitidine (historical)
Appears in panels
Confirmation method
GC-MS or LC-MS/MS is the standard confirmation method for Amphetamines & methamphetamine.
Sources & references
drugtest.co content is sourced from primary regulatory and clinical references. We do not cite gray-market or "how to pass" sources.