Standard 5-panel and 10-panel urine drug tests do not screen for kratom alkaloids (mitragynine or 7-hydroxymitragynine), and kratom use will not produce a positive result on these standard screens. However, kratom-specific drug tests exist: some employers, clinicians, and courts have begun ordering expanded panels that include mitragynine detection via immunoassay. A 2020 study in Journal of Analytical Toxicology described a urine immunoassay test for mitragynine with a detection window of 6–9 days after last use for regular users. The key question is whether your specific test includes kratom — standard panels do not, but specialized expanded panels can.

How long does kratom stay detectable if tested for?

Mitragynine's detection window in specialized kratom urine tests: approximately 6–9 days for regular users. Urine detection depends on dose, frequency, and kidney function. Hair follicle tests can detect mitragynine for 90+ days in chronic users, as with most other substances. Blood tests show kratom alkaloids for 24–48 hours after last use. For occasional users (once or twice per week), the urine detection window is likely 2–4 days. There is no FDA-approved kratom test kit; most kratom testing uses lab-developed or research-grade immunoassays.

Does kratom cause a false positive for opiates?

Some kratom users worry that kratom's opioid receptor activity will produce a false positive on standard opiate drug tests. Kratom alkaloids do not share the structural features that opiate immunoassay antibodies detect — standard opiate panels target morphine, codeine, and heroin metabolites, which are structurally distinct from mitragynine and 7-OH. Multiple clinical reports confirm kratom does not cross-react with standard opiate immunoassay tests. If you test positive for opiates while using kratom, the cause is opiate exposure — not kratom.

What if you're in a profession with kratom testing?

Specific industries (DOT-regulated transportation, some military contexts, certain probation/drug court programs) may use expanded panels. If you're subject to regular testing in these contexts and uncertain whether kratom is included, ask your testing administrator what compounds are screened. Kratom's unscheduled status doesn't automatically protect you if an employer has decided to screen for it — workplace drug testing in the US is largely employer-determined for non-regulated industries. Find kratom products at Elevated Haze.