Preferred Minimum: 4 mL urine (with no additives or preservatives) Absolute Minimum: 0.5 mL urine

For medical purposes only; not valid for forensic use. Drugs covered: fentanyl and metabolite (norfentanyl). Positive cutoff: 1.0 ng/mL. The absence of expected drug(s) and/or drug metabolite(s) may indicate non-compliance, inappropriate timing of specimen collection relative to drug administration, poor drug absorption, diluted/adulterated urine, or limitations of testing. The concentration value must be greater than or equal to the cutoff to be reported as positive. Interpretive questions should be directed to the laboratory.