Kratom does not show up on standard workplace drug tests. The five-panel and ten-panel screens used by most employers test for amphetamines, cocaine, marijuana, opioids like heroin and oxycodone, and PCP. Mitragynine, the primary active compound in kratom, is chemically distinct from these substances and won’t trigger a positive result on a standard panel. Detecting kratom requires a specialized test that specifically targets its alkaloids.
Standard Drug Tests Don’t Screen for Kratom
Federal workplace drug testing, as outlined by SAMHSA, covers five drug categories: amphetamines, cocaine, marijuana, opiates and opioids, and PCP. Kratom falls outside all of these categories. Even expanded 10-panel or 12-panel tests, which add benzodiazepines, barbiturates, and other substances, do not include kratom.
That said, kratom can cause a false positive for methadone on certain immunoassay screens. Research published in the American Journal of Clinical Pathology found that a kratom metabolite triggers false positive results on one widely used methadone screening test. If you use kratom and test positive for methadone unexpectedly, a confirmatory test would clear the false result, since the more precise method can distinguish between the two substances.
How Specialized Kratom Tests Work
When someone specifically orders a kratom test, the lab uses liquid chromatography paired with tandem mass spectrometry (LC-MS/MS). This is the same type of advanced technology used to confirm results for other drugs. It works by separating individual compounds in a sample and then identifying them by their molecular weight and structure. The two compounds labs look for are mitragynine and 7-hydroxymitragynine, kratom’s two most pharmacologically active alkaloids.
These tests can be run on urine or blood. Urine is the most common specimen because it’s easy to collect and offers a reasonable detection window. Blood testing is less common and typically reserved for clinical or forensic situations. Hair follicle testing for kratom exists but is rarely used in practice.
Detection Windows by Sample Type
How long kratom stays detectable depends on the type of test and how frequently you use it.
- Urine: 1 to 7 days after the last dose. Occasional users typically clear kratom from urine within 2 to 3 days. Regular users may test positive for up to a week.
- Blood: Roughly 1 to 2 days, given the compound’s half-life (more on this below).
- Hair follicle: Up to 90 days, though this method is infrequently used for kratom.
Why Detection Times Vary So Much
The wide range in urine detection, from one day to seven, comes down to how your body processes mitragynine. A pharmacokinetic study in humans found that mitragynine has a terminal half-life of roughly 23 hours, meaning it takes about a full day for your body to eliminate half the compound from your bloodstream. But individual variation is significant. In that same study, the half-life ranged from about 7 hours to nearly 40 hours across nine participants.
Several factors push detection times longer: higher doses, more frequent use, slower metabolism, higher body fat percentage, and older age. Someone who takes kratom daily at high doses will accumulate the compound in their system, extending the window well beyond what a single-dose user would experience. Hydration and kidney function also play a role in how quickly mitragynine and its metabolites clear through urine.
Who Orders Kratom-Specific Tests
Most people will never encounter a kratom-specific test in a routine employment screening. These tests are more commonly ordered in specific contexts: substance abuse treatment programs that want a full picture of what a client is using, pain management clinics monitoring patients on opioid agreements, probation or parole programs in states where kratom is restricted, and forensic investigations.
Some private testing companies now offer kratom panels that individuals can order themselves, either as standalone tests or add-ons to broader drug screens. If you’re concerned about whether a particular test includes kratom, the simplest approach is to ask what substances the panel covers. Labs are required to disclose what they’re screening for, and kratom will only appear if it was explicitly included.
Kratom’s Legal Status Affects Testing
Kratom is not a federally controlled substance in the United States, which is one reason it isn’t part of standard drug panels. However, several states and municipalities have banned or restricted it, including Alabama, Arkansas, Indiana, Rhode Island, Vermont, and Wisconsin. In jurisdictions where kratom is regulated, testing is more likely to be ordered by courts or correctional systems. Military drug testing programs have also added kratom to their screening in some branches. If you’re subject to testing in any of these contexts, it’s worth confirming whether kratom is on the panel, because the answer varies by organization and location.