How Long Does Kratom Stay in Your System?

Kratom leaves, pills and powder next to an image of the human body

Because the medical community is just beginning to study Kratom, there is little available data about how it impacts the body or how long it stays in a person’s system. The main active ingredient in Kratom is mitragynine, but the Kratom contains many other active ingredients that contribute to its effect. Kratom (mitragynine) is federally legal in the United States, but many states have banned it, and the Drug Enforcement Agency (DEA) is considering reclassifying it as a Schedule I substance. Schedule I substances have no recognized medical use and a high potential for abuse and addiction.  

Duration of Effects of Kratom

The effects of Kratom are reported to last between four and eight hours, depending on the strain. The effects of Kratom have been described as similar to both opioid and coca drugs. Opioid-like drugs relax the body, relieve pain and elicit pleasurable feelings. Coca-like drugs are stimulating and increase energy, such as coca-leaves and concentrated cocaine.

Half-Life of Kratom

The half-life of a drug is how long it takes for the amount of the drug in the body to be reduced by half. According to one study, the half-life of Kratom is typically no longer than 39 hours

Prescription and over-the-counter drugs in the United States must submit rigorous data to the Food and Drug Administration (FDA), so the public can make informed decisions about using the drug. Kratom and other supplements do not have these same regulations, which means that little is known about its half-life or the effects it has on the body.

How Long Will Kratom Show in Drug Test?

Tests for kratom and its metabolite 7-hydroxymitragynine are relatively new, so we have some, but not a lot of information about the way they’re tested for. 


Kratom is not detectable in urine in most settings. However, if an employer is looking specifically for mitragynine, a lab test can be ordered, but it is not clear how long Kratom use can be detected.


Kratom stays in the blood for 40–200 hours or two to nine days. This information is based on mitragynine’s half-life and how long the drug stays in the body. However, even though Kratom is present in the blood, it is still not currently detectable in blood tests.


Kratom is not tested for in saliva drug tests at this time.


In theory, Kratom could be detectable for up to 90 days in a hair drug test, since mitragynine will deposit into the hair and should be measurable for three months. However, there are no tests at this time designed to detect it.

Factors Affecting How Long Kratom Stays in Your System

Kratom and mitragynine metabolism may be affected by a few different factors, including:

  • Amount Used: Using more Kratom is likely to increase how long the ingredients stay in the system. Since Kratom contains many active ingredients and a complex metabolism, taking more Kratom may exponentially increase how long it stays in the system.
  • Drug Interactions: Kratom is metabolized in the liver and has the potential to cause many drug interactions. Some interactions may increase how long it stays in the system, though these specific interactions are currently unknown.
  • Frequency of Use: Using Kratom more frequently will increase how long it stays in the system.
  • Overall Health: Kratom is mostly metabolized in the liver, so people with liver problems will break it down more slowly.

How to Get Kratom Out of Your System

Time is the only way to remove Kratom and its ingredients from the body. It could take anywhere from a few days to over a week for Kratom to completely clear from the body. There are no techniques to remove Kratom from the body more quickly.

Key Points: How Long Does Kratom Stay in Your System?

  • Kratom is an herbal supplement that acts like both an opioid pain medication a stimulant and might have a high potential for abuse and addiction
  • Research on Kratom is in the early stages, and there are currently few Kratom drug tests available
  • The main active ingredient in Kratom is mitragynine, and it may stay in the body between 40–200 hours
  • Kratom is metabolized by the liver and has the potential for many drug interactions

If you or someone you know grapples with drug or alcohol addiction, we can help. Call The Recovery Village Ridgefield to speak with an addiction professional.

PubChem. “Mitragynine.” 2019. Accessed Aug 5, 2019.

Wananukul, Winai, et al. “Pharmacokinetics of Mitragynine in Man.” Drug Design, Development and Therapy, April 2015. Accessed Aug 5, 2019.

Suhaimi, Farah W. et al. “Neurobiology of Kratom and its main alkaloid mitragynine.” Brain Research Bulletin, March 25, 2016. Accessed August 26, 2019.

Medical Disclaimer: The Recovery Village aims to improve the quality of life for people struggling with a substance use or mental health disorder with fact-based content about the nature of behavioral health conditions, treatment options and their related outcomes. We publish material that is researched, cited, edited and reviewed by licensed medical professionals. The information we provide is not intended to be a substitute for professional medical advice, diagnosis or treatment. It should not be used in place of the advice of your physician or other qualified healthcare provider.