What Is Methamphetamine?

What it is

Methamphetamine is a potent illicit stimulant (crystal meth).

Why it matters

A standard workplace-screening analyte; cut-off 1000 ng/mL.

Specimen

Urine

Cut-off

500–1000 ng/mL

Interpretation

Positive = methamphetamine detected (presumptive). Negative = below cut-off.

Limitations

Cross-reactivity with some sympathomimetics possible; confirm positives by GC-MS/LC-MS.

Related test: Methamphetamine (MET) Rapid Test — specimen: Urine

Frequently Asked Questions

Can cold medication cause a positive methamphetamine result? Some sympathomimetics can cross-react; confirm positives by GC-MS/LC-MS.

Related knowledge

• Workplace drug screening