How Long Does Kratom Stay in Your System?

The benefits of kratom are not supported by strong clinical evidence. Doctronic can help you explore evidence-based alternatives.

Kratom may be detectable in urine for several days, but no one has firmly measured how long. Research is thin, and the answer depends on how much you take, how often, and which test is used. The effects wear off much sooner than that.

Detection windows

Test	What's known
Urine	Not known; maybe days
Blood	No published window
Hair	No published window
Saliva	No published window

The best data come from one small study from 2015, of adults who used kratom daily. Mitragynine, kratom's main compound, took about 23 hours on average to fall by half in the body (its terminal half-life). The range between people was wide, about 16 hours either way. That suggests it can stay in your body for days, but it isn't a tested detection window.

Be wary of any site that gives an exact number of days.

What affects it

How much you take. More kratom means more for your body to clear.
How often you take it. The study's figure comes from people who used kratom daily. Occasional use may clear differently.
Which test is used. Standard drug screens don't look for kratom at all. A kratom-specific lab test must be ordered.

How long the effects last

Kratom's effects last about 5 to 7 hours and are strongest at 2 to 4 hours.

If you use kratom regularly and stop, you may get withdrawal symptoms. See the kratom withdrawal timeline for what to expect.

7-OH

No published detection window was found for 7-OH (7-hydroxymitragynine). 7-OH products are concentrated and aren't the same as kratom leaf, so figures for kratom don't carry over.

Drug tests

For which tests do and don't include kratom, see our guide, Does kratom show up on a drug test?

Worried about a test result but not sure it's worth a clinic visit and a bill? Ask Doctronic's medical AI for free, or see a licensed doctor by video for $39.