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Kratom

Revised April 2019

What is kratom?

Kratom is a tropical tree (Mitragyna speciosa) native to Southeast Asia, with leaves that contain compounds that can have psychotropic (mind-altering) effects.

A kratom tree.Photo by DEA

Kratom is not currently an illegal substance and has been easy to order on the internet. It is sometimes sold as a green powder in packets labeled "not for human consumption." It is also sometimes sold as an extract or gum.

Kratom sometimes goes by the following names:

  • Biak
  • Ketum
  • Kakuam
  • Ithang
  • Thom

How do people use kratom?

Most people take kratom as a pill, capsule, or extract. Some people chew kratom leaves or brew the dried or powdered leaves as a tea. Sometimes the leaves are smoked or eaten in food.

How does kratom affect the brain?

Kratom can cause effects similar to both opioids and stimulants. Two compounds in kratom leaves, mitragynine and 7-α-hydroxymitragynine, interact with opioid receptors in the brain, producing sedation, pleasure, and decreased pain, especially when users consume large amounts of the plant. Mitragynine also interacts with other receptor systems in the brain to produce stimulant effects. When kratom is taken in small amounts, users report increased energy, sociability, and alertness instead of sedation. However, kratom can also cause uncomfortable and sometimes dangerous side effects.

What are the health effects of kratom?

Reported health effects of kratom use include:

  • nausea
  • itching
  • sweating
  • dry mouth
  • constipation
  • increased urination
  • loss of appetite
  • seizures
  • hallucinations

Symptoms of psychosis have been reported in some users.

Can a person overdose on kratom?

There have been multiple reports of deaths in people who had ingested kratom, but most have involved other substances. A 2019 paper analyzing data from the National Poison Data System found that between 2011-2017 there were 11 deaths associated with kratom exposure. Nine of the 11 deaths reported in this study involved kratom plus other drugs and medicines, such as diphenhydramine (an antihistamine), alcohol, caffeine, benzodiazepines, fentanyl, and cocaine. Two deaths were reported following exposure from kratom alone with no other reported substances.* In 2017, the FDA identified at least 44 deaths related to kratom, with at least one case investigated as possible use of pure kratom. The FDA reports note that many of the kratom-associated deaths appeared to have resulted from adulterated products or taking kratom with other potent substances, including illicit drugs, opioids, benzodiazepines, alcohol, gabapentin, and over-the-counter medications, such as cough syrup. Also, there have been some reports of kratom packaged as dietary supplements or dietary ingredients that were laced with other compounds that caused deaths. People should check with their health care providers about the safety of mixing kratom with other medicines.

*(Post et al, 2019. Clinical Toxicology).

Is kratom addictive?

Like other drugs with opioid-like effects, kratom might cause dependence, which means users will feel physical withdrawal symptoms when they stop taking the drug. Some users have reported becoming addicted to kratom. Withdrawal symptoms include:

  • muscle aches
  • insomnia
  • irritability
  • hostility
  • aggression
  • emotional changes
  • runny nose
  • jerky movements

How is kratom addiction treated?

There are no specific medical treatments for kratom addiction. Some people seeking treatment have found behavioral therapy to be helpful. Scientists need more research to determine how effective this treatment option is.

Does kratom have value as a medicine?

In recent years, some people have used kratom as an herbal alternative to medical treatment in attempts to control withdrawal symptoms and cravings caused by addiction to opioids or to other addictive substances such as alcohol. There is no scientific evidence that kratom is effective or safe for this purpose; further research is needed.

Points to Remember

  • Kratom is a tropical tree native to Southeast Asia, with leaves that can have psychotropic effects.
  • Kratom is not currently illegal and has been easy to order on the internet.
  • Most people take kratom as a pill or capsule. Some people chew kratom leaves or brew the dried or powdered leaves as a tea. Sometimes the leaves are smoked or eaten in food. Two compounds in kratom leaves, mitragynine and 7-α-hydroxymitragynine, interact with opioid receptors in the brain, producing sedation, pleasure, and decreased pain.
  • Mitragynine can also interact with other receptor systems in the brain to produce stimulant effects.
  • Reported health effects of kratom use include nausea, sweating, seizures, and psychotic symptoms.
  • Commercial forms of kratom are sometimes laced with other compounds that have caused deaths.
  • Some users have reported becoming addicted to kratom.
  • Behavioral therapies and medications have not specifically been tested for treatment of kratom addiction.

Learn More

For more information about kratom, visit:

This publication is available for your use and may be reproduced in its entirety without permission from the NIDA. Citation of the source is appreciated, using the following language: Source: National Institute on Drug Abuse; National Institutes of Health; U.S. Department of Health and Human Services.

This page was last updated April 2019

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NIDA. (2019, April 8). Kratom. Retrieved from https://www.drugabuse.gov/publications/drugfacts/kratom

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