How Long Does Kratom Stay In The System?

kratom drug testing

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Kratom Half-Life

Kratom is still legal in some states of the U.S., and its effects haven’t been researched in-depth. On the other hand, Kratom abuse has been widely noticed by medical professionals, so the use of this substance is liked with several health risks.

As the average half-life of the drug is around 24 hours, it’s believed that Kratom will stay for up to 6 days. However, the slowest elimination half-life was found to be 40 hours, therefore, 9-14 days are needed to get clean.

Who Can Be Tested For Kratom?

Testing for Kratom is not common as the drug is still legal in 48 states in the U.S. What’s more, the standard SAMSHA-5 panel can’t detect the drug. Some specialized tests, though, can be used to find Kratom in one’s system. Professionals prefer blood samples, and urinalysis and don’t prefer swab or hair tests as much for Kratom detection.

How Long Does Kratom Stay In The System?

Kratom or Mytragina speciosa korth is a tropical tree whose leaves are used to increase the energy levels of the user, to relieve pain or just to induce relaxation. Although Kratom is becoming a popular drug, its effects and elimination haven’t been studied completely in people. What’s more, as the drug is legal in 48 states in the U.S., there’s no enough research.
However, it’s believed that Kratom will clear from one’s system for up to 6 days.

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Factors That Influence How Long Kratom Stays In The System

Although researchers have not looked at Kratom in-depth, we should consider various factors that may affect the duration of the drug:

  • Dosage: Larger doses lead to longer duration of Kratom effects.
  • Ways of administration: Note that Kratom can be ingested, chewed, smoked or made into tea.
  • Type of product: There are different strains of leaves. Some green leaves provide a lot of energy for over eight hours, while some red leaves induce sedation that lasts between five and ten hours, on the other hand, some white leaves give an intense rush for up to 3-5 hours.
  • Food intake and activities: Regular exercising, for example, will help to clean the body quicker. Eating and drinking water also affect the effects of the drug. For instance, eating acidic food can lead to faster elimination.
  • Weight and age of the user: Elder users need more time to process the drug. Also, Kratom can be used to melt one’s body fat off.
  • The rate of metabolism and urine pH: Some health conditions can also affect the elimination of the drug as well as high acidic environments.
  • History of abuse: Mixing Kratom with other drugs can lead to long-lasting effects and risks for the health.

Kratom Metabolism Process

Research shows that some of the alkaloids that derive from Kratom are mitragynine, paynantheine, and speciogynine. Mitragynine is the most active alkaloid in the drug, which acts as an opioid receptor agonist (in particular, as a mu-opioid receptor agonist).
kratom pills
Mitragynine is absorbed by the gastrointestinal tract, reaching peak plasma concentration under an hour, and metabolized by the liver (by the CYP2D6 isoenzymes in the liver). That makes Kratom part of that particular group of drugs called CYP2D6 inhibitors.
Mitragynine is linked to two metabolites: 5-desmethylmitragynine and 17-desmethyldihydromitragynine. Highly acidic environments can destroy this alkaloid, so the pH of the urine can affect the duration and the elimination of the drug.

Kratom Half-Life & Effects

The only in-depth research on Kratom, as stated above, wasn’t done on people but animals and has been stopped since 2015. Scientists believe that the half-life of the primary alkaloid in Kratom – mitragynine, is around 24 hours, which means that one can get completely clean within six days.
The slowest elimination half-life found was around 40 hours, or in other words, the user would need more than nine days to get clean.
Kratom effects can last for up to 3-10 hours.

Kratom & Drug Testing Information

Kratom can’t be detected by standard tests done by SAMHSA – 5, as the Substance Abuse and Mental Health Services Administration checks for five types of drugs (opiates, amphetamines, cocaine, cannabinoids, and PCP). Therefore, only specialized tests can detect Kratom.

How Long Does Kratom Stay In The Saliva?

As the drug is not completely illegal and can be purchased easily online, swab tests are not standard, so there’s no precise data.

How Long Does Kratom Stay In The Blood?

Blood tests can be performed and can detect Kratom during the first 24 hours and up to few days. The concentration of mitragynine can be between 10 and 50 micrograms per liter, while in cases of intoxication – over 100 mcg/l.

How Long Does Kratom Stay In The Hair?

Like saliva tests, hair tests are uncommon when it comes to Kratom abuse. However, usually, hair analysis can provide a longer window of detection, sometimes up to 90 days.

How Long Does Kratom Stay In The Urine?

Urinalysis will reveal Kratom use: the drug will show up in around six hours, and it can still be detected for up to three days.
Although, it takes 6-9 days to clean Kratom out of the system, at least two weeks are necessary to be on the safe side.
What’s even better, stay away from the drug. Just because Kratom is still legal in the U.S. doesn’t mean it is safe.

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About Author

Peter Grinspoon, MD

Dr. Peter Grinspoon is an experienced physician with long-term clinical practice experience. As a former analgesic addict, Dr. Grinspoon knows precisely how important it is to provide patients with effective treatment and support. Medical writing for him is the way to communicate with people and inform them about their health.


Leave a comment

  • Jay
    I have had pretty bad withdrawals lasting two weeks,stay away from this stuff
    • Jackson
      You must’ve been really overdoing it if you experienced withdrawals lasting that long. Keep everything in moderation and do your homework before using and you will be fine. If you only use it twice a week, you can be assured you won’t experience the withdrawal symptoms when discontinuing usage. If you use it regularly every day at moderate doses than you can expect the withdrawal symptoms, which are quite mild especially compared to actual opiates, to last about a week or less.
    • MC
      If you have an addictive, compulsive, obsessive personality and have self admitted, at one time or another, as an Alcoholic/Drug addict I PROMISE you…the withdrawals are brutal and are JUST like withdrawing from Opiodes! I was ingesting over 30grams + orally by the end…it didn’t start out that way. It NEVER does. It’s subtle, it’s Progressive just like ANY mind altering drug. It starts off pleasant where 1/2 tsp does you well for 4-6 hours and them by the end, 15 months, I was taking 1/2 tsp. like EVERY HOUR! Today is Day 4 and the RSL is BRUTAL. Lack of sleep, chills, sneezing, body aches, lethargy are ALL there! I hope they ban this DRUG. It nearly cost me my life! I’m back in AA and I just want to be FREE and experience that natural high I got from helping others and having a connection with God!
      • Andy
        I hope you made it! I’m on day 11 and still kicking at night. It has been as difficult stopping this as it was stopping Suboxone. I’m hoping the RSL stops soon. Not sure how long I can deal with it!
        • Joe
          Don’t give up.. If not u will start all over again.. 11 days is miracle.. It is tough but u have made it.. Leave this stuff get clean and start your new life like other
        • Joe Beauchamp
          They sell restless leg and cramp pills at most pharmacies and they work for my wife. And yep , I am trying to get off opiates and now this crap has got me. Going to have to detox and am not looking forward to it. It will get you. Stay away.
  • Alice
    There is no way to “Keep everything in moderation and do your homework before using and you will be fine.” when using a mood altering substance like kratom especially one that chemically mimics opiates. I became fatigued and constipated; had altered liver function and tremors. I used kratom for five years and at the end when deciding enough was enough and it was time to stop, withdrawal was hard and took several weeks. I felt like I had the flu, body aches, fever, runny nose, headache, tremors, hallucinations, etc. Sound familiar? I wasn’t using a huge amount per day either. Jay’s comment about staying away is a good one. There is no substitute for staying clean.
    • jerry oneill
      I’m just wondering what did you do to get off kratom addiction. I’m committed to stopping but am trying to design a plan on my own .. HELP please
      • Joe
        I took tramadols 100mg and gabapentin 500mg for 7 to 10 days.. Consult your doc. The peak has eliminatedafter 7 days but then you must be mentally ready to combat fatigue and feel empty in your mind during post withdrawal.. It can last for up to 3 months before you will be back to 100 percent normal.. Keep busy during period.. And do sports it helps a lot
    • Temperamental
      Alice, Did you quit cold turkey or taper? Did you go through withdrawls on your own or did you have to get treatment?
  • Gary Pinchot
    Just wanted to give you a heads up that my pain management doc in Florida (whose ‘prescribing nurse’ is horrible) has claimed to have detected kratom in my urine over a month after I last took any. I literally called BS to the doc and I think he is just very anti-kratom and pro-suboxone(which is horrible for pain). So if you are being tested you may want to give yourself a little longer than 3 weeks if they send your test off to the lab.
    • John
      This is exactly right. Big Pharma doesn’t want Kratom on the shelf. Dips into profits
  • T
    Crazy crazy crazy, quit bad mouthing kratom. You are responsible for your actions. It’s a tool. Use it wisely not like a jay
  • Leo
    Oh my god, I had urin drug test done the other day and came up posetive for methadone, I DONT TAKE METHADONE, it was this stuff here KRATOM. I got into big trouble because of this. KRATOM INSIDE YOU WILL TEST POSETIVE FOR METHADONE
    • Amber
      Wrong Leo. You either did methadone or somehow it got into your kratom, which is highly unlikely. Both substances break down chemically in your body differently. It is IMPOSSIBLE.
  • Jaye
    Kratom will not make you test positive for methadone unless somehow methadone got mixed into your kratom. That’s just ridiculous. They dont even metabolize into the same things in the body which is why you have to be specifically tested for each substance (as opposed to a substance group like with some other substances).
    • K
      It also showed up as methadone in my ua. I.assure you I have never and do not take methadone.
  • John
    Does anyone have experience with kratom drug test and know for sure how long it actually stays in your system? I’ve passed after 4 days of not using but I was drinking a LOT of water/coffee those days and drank 2 qcarbo 16s (detox drinks) the day of the test. Anyone?
  • Beth
    Kratom will show in specialized drug tests that pain clinics use up to a month.. I have tested positive for it, I wanted to get the f**k off of opiates.. I have chronic pain it will never go away. When I have moderate pain it worked.. but for those bad days nothing helps.. I went as far as having a spinal cord stimulator put it only to have to have it removed because some of the metals gave me a bad reaction.. and I got a huge infection.. I wanted a holistic solution for the problem but all the doctors are pushing opioids or there counterparts.. it’s very frustrating.. it’s been said only use in moderation if you have problems with addiction stay away from it.. it is a tool in the holistic community.. not in the medical.. be safe and do your homework.
  • Kristin
    If I drink a lot of water and flush my self out how long do you think it will stay in my system
  • Ann
    Well I think it takes up to nine days to get out of your system. I haven’t taken any since Sunday and it’s Wednesday and I’m still not feeling my pain medication because it blocks it. Makes me so mad . I probably won’t feel it till Tuesday. I have tried to look up about Kratom blocking opiates all over the internet but there’s nothing about it on there. Has this ever happened to you?
  • Wy
    Make sure u have a reliable source for Kratom. I ordered some online and tested positive for Norbupenephrine, a metabolite of Suboxen. I got in big trouble. It never happened with store bought products but often stuff u buy online “May” be cut to make it seem stronger. I detoxed over 7 days, phenibut/Gaba helped. Kratom needs to stay legal, it is a tool that many opioid addicts need. [email protected]$& Suboxen
  • Kelly
    My urine test came back positive for methadone. I have never taken methadone, ever. It is the kratom. There is some incorrect info being given.
  • Jocelyn
    I was still testing positive for kratom at treatment after 25 days. And withdrawal was awful. I used occasionally and then a few times a week for a month or so and then daily for a couple weeks before treatment
  • Dawn
    I have been using kratom for 1year for severe pain I had a random drug test at work are policy is your job is safe if you let them know before the test is done if taken anything prescription needed well I did take a ferocet a couple days before I do not have a prescription for ferocet I let them know it would show up how ever I didn’t say anything about kratom because it is legal well now I’m trying to save my job any advice