What Does AMP Mean on a Drug Test? (Amphetamines)?

Evidence-based answer reviewed against SAMHSA cutoffs and FDA assay documentation · Updated August 2026

Quick answer: AMP is the laboratory abbreviation for Amphetamines. AMP is the amphetamine strip — it flags mixed amphetamine salts-class prescriptions AND street speed alike. Prescription verified through the MRO reports negative.

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 Amphetamines

Urine: 500 ng/mL initial screen; GC–MS confirm at 250 ng/mL requiring d-amphetamine (methamphetamine confirm additionally requires methamphetamine ≥250 ng/mL).

Amphetamines are on every standard panel including the federal 5-panel. A prescription does not exempt you — it explains the result. Take your prescription (or pharmacy printout) to the collection site or have it ready for the Medical Review Officer call; verified prescriptions are reported as negative.

Detection windows

Ranges reflect occasional-to-heavy use patterns from FDA device inserts and SAMHSA-certified lab conventions.
Test typeTypical Amphetamines detection window
Urineoccasional: 1–3 days · regular: up to 4–5 days
Saliva (Mouth Swab)any: 1–2 days (20–50 hours)
Hair Folliclesup to 90 days
Bloodany: ~12–24 hours

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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Medical disclaimer: DrugPanels provides educational information about laboratory drug testing and does not offer medical advice, diagnosis, or treatment. Detection windows are population ranges — individual results vary with metabolism, dose, frequency and health status. Never stop prescribed medication to pass a test without talking to your prescriber. Affiliate disclosure: some links on this page are affiliate links; if you order through them we may earn a commission at no additional cost to you.

People also ask

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.

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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)