Evidence-based·Last reviewed May 30, 2026·How we grade evidence

Kratom

Botanical

Useful mainly for no established therapeutic use; harms outweigh unproven benefits.

Quick decision guide

May help most

no established therapeutic use; harms outweigh unproven benefits

Common dosing range

No legitimate clinical dose

When to expect effects

Not applicable

Watch out for

addiction, dependence, liver injury, seizures, and fatal respiratory depression, especially with other depressants

What is it

Kratom (Mitragyna speciosa) is a Southeast Asian tree in the coffee family whose leaves contain alkaloids (notably mitragynine and 7-hydroxymitragynine) with opioid-like and stimulant effects. It is sold widely as a 'dietary supplement' in the United States but the FDA has not approved it, and its legal status varies by state and country.

Is it worth it for you?

Use this as a quick fit check, not a diagnosis.

Worth considering if

there is no clear evidence-based scenario where benefits outweigh the risks

Probably skip if

you have any history of substance use disorder
you take opioids, benzodiazepines, or other CNS depressants
you have liver or cardiovascular disease, or are pregnant

Evidence at a glance

opioid withdrawal or pain (self-treatment)

Mixed Evidence
Effect
Unproven; not established in controlled trials
Best fit
none established
Time
Not applicable

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

opioid withdrawal or pain (self-treatment)

Mechanism only
Mixed Evidence

Some people self-treat pain or opioid withdrawal with kratom because its alkaloids are partial mu-opioid agonists, but this rests on mechanism and anecdote, not controlled clinical trials. Documented harms include physical dependence, addiction, hepatotoxicity, seizures, respiratory depression, and death, often in combination with other substances. 7-hydroxymitragynine is far more potent at the mu-opioid receptor and concentrated products are especially dangerous.

Effect size
Unproven; not established in controlled trials
Time to effect
Not applicable
Best fit
none established
Less likely
anyone, given the absence of controlled efficacy data and significant harm potential

Bottom line: There is no controlled evidence that kratom safely treats withdrawal or pain, and its documented harms are serious.

Evidence is mixed

Self-reported benefit is offset by a substantial record of dependence, overdose, and death; no rigorous efficacy trials support therapeutic use.

How it works

Mitragynine and 7-hydroxymitragynine are partial agonists at the mu-opioid receptor and also interact with kappa- and delta-opioid receptors, alpha-2 adrenergic, and serotonergic receptors. Low doses tend to be stimulating (similar to coffee), while higher doses produce opioid-like analgesia and sedation. 7-Hydroxymitragynine is a much more potent mu-opioid agonist than mitragynine itself and may drive much of the addiction and overdose risk. Concentrated 7-hydroxymitragynine products are particularly concerning.

How to take it

1. Typical dose
No legitimate or recommended clinical dose exists
2. Timing
Not applicable
3. With food
Not applicable
4. How long to try
Not recommended for any duration

What to track

signs of dependence or withdrawal
signs of liver injury (jaundice, dark urine)
sedation or breathing changes

2 commercial forms

Compare the main delivery options and what they’re best suited for.

Dried leaf powder / capsules / tea

Most common form.

Variable potency; alkaloid content depends on strain and processing.

Concentrated extract / 7-OH-mitragynine products

Particularly hazardous; FDA has flagged these specifically.

Markedly more potent and dependence-forming.

Safety

Know the common side effects, key cautions, and who should avoid it.

Common side effects

nauseaconstipationdizzinesssedation

Who should avoid it

Pregnancy & breastfeeding

Avoid entirely; use in pregnancy can cause neonatal abstinence syndrome.

Interactions

opioidsMajor

additive respiratory depression and overdose risk

benzodiazepines and alcoholMajor

additive CNS and respiratory depression

CYP2D6 and CYP3A4 substrates (antidepressants, antipsychotics, anticoagulants)Major

enzyme inhibition can raise drug levels

Choosing a product

What to look for on the label — and what to be skeptical of.

Look for

no recommendation to purchase; legal status varies and products are unregulated

Be skeptical of

safe natural opioid alternative
treats addiction
non-addictive pain relief
concentrated 7-hydroxymitragynine

Frequently asked questions

Is kratom a safe natural alternative to opioids?

No. Kratom acts on opioid receptors, can cause dependence, withdrawal, overdose, and death, particularly with concentrated extracts or in combination with other drugs.

Is kratom legal?

Federally it is not scheduled as a controlled substance in the U.S., but several states and many countries ban it. The FDA has not approved it for any use.

Can I get addicted to kratom?

Yes. Physical dependence and addiction are well-documented.

References by claim

opioid withdrawal or pain (self-treatment)

Vicknasingam et al., 2020PMC (2020) link

Safety

Memorial Sloan Kettering — KratomMSKCC About Herbs link

Track Kratom with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

Coming to App Store
Evidence-based·Last reviewed May 30, 2026·Evidence current as of May 30, 2026·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.