What Does MET Mean on a Drug Test? (Methamphetamine)?
Evidence-based answer reviewed against SAMHSA cutoffs and FDA assay documentation · Updated August 2026
Quick answer: MET is the laboratory abbreviation for Methamphetamine. MET is shorthand for methamphetamine on many cup brands — same drug, same confirmation rules as mAMP.
Reading your cup or lab report
Multi-panel cups print 2–4 letter codes beside each strip line. One line per drug class; a visible control line plus absent drug line = negative for that class. Faint lines still count as present (they're competitive-inhibition assays) — the classic misread.
About Meth
Urine: 500 ng/mL initial; confirm requires methamphetamine ≥250 ng/mL AND amphetamine ≥100 ng/mL.
Meth sits on all standard panels. Confirmation requires both parent methamphetamine and its amphetamine metabolite above thresholds, which separates illicit meth from pure prescription amphetamine use.
Detection windows
| Test type | Typical Meth detection window |
|---|---|
| Urine | occasional: 3–5 days · heavy: up to ~7 days |
| Saliva (Mouth Swab) | any: 1–4 days |
| Hair Follicles | up to 90 days |
| Blood | any: 1–3 days |
Related codes on the same cup
Cups group codes logically: AMP/mAMP (stimulants), OPI/MOP/OXY/BUP (opioid family), BZO/BAR (depressants), COC/THC/PCP (classics), plus validity markers like creatinine printed on lab reports rather than cups.
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Do prescriptions count against me?
No — verified prescriptions report as negative through the Medical Review Officer. Declare medications at collection and answer the follow-up call.
Sources & further reading
- SAMHSA — Mandatory Guidelines for Federal Workplace Drug Testing Programs (cutoffs, MRO process)
- DOT — 49 CFR Part 40 procedures for transportation workplace testing
- Brahm NC et al., Mayo Clinic Proceedings 2008;83(1):66–76 — false-positive cross-reactivity reference
- FDA — drug-of-abuse test device labeling (detection window conventions)