What is the typical SAMHSA cutoff for Amphetamines in the screening panel?

What is the typical SAMHSA cutoff for Amphetamines in the screening panel?

• A. 250 ng/mL
• B. 500 ng/mL
• C. 1000 ng/mL
• D. 300 ng/mL

Answer: (B)

The key idea is how screening cutoffs determine when a drug immunoassay result is considered positive and must be sent for confirmatory testing. For amphetamines in SAMHSA-screened workplace drug testing, the standard screening cutoff is 1000 ng/mL. This means a specimen with a result at or above 1000 ng/mL is flagged as presumptive positive and requires a confirmatory GC/MS test to verify the finding. The cutoff value is chosen to balance identifying true positives while limiting false positives and ensuring consistency across labs. Some older materials or non-SAMHSA panels may cite 500 ng/mL, but the federal SAMHSA guideline widely used today sets the amphetamine screening threshold at 1000 ng/mL. The other numbers listed in the options aren’t the standard SAMHSA cutoff for amphetamines in the screening panel.

The key idea is how screening cutoffs determine when a drug immunoassay result is considered positive and must be sent for confirmatory testing. For amphetamines in SAMHSA-screened workplace drug testing, the standard screening cutoff is 1000 ng/mL. This means a specimen with a result at or above 1000 ng/mL is flagged as presumptive positive and requires a confirmatory GC/MS test to verify the finding. The cutoff value is chosen to balance identifying true positives while limiting false positives and ensuring consistency across labs.

Some older materials or non-SAMHSA panels may cite 500 ng/mL, but the federal SAMHSA guideline widely used today sets the amphetamine screening threshold at 1000 ng/mL. The other numbers listed in the options aren’t the standard SAMHSA cutoff for amphetamines in the screening panel.