Regulatory note
Not FDA‑approved for any medical use
Risk profile
Nausea, dizziness, constipation are common
Interactions
Higher risk with alcohol, opioids, benzos, stimulants
Dependence
Frequent use may lead to dependence & withdrawal
Overview
Kratom (Mitragyna speciosa) is a tropical tree native to Southeast Asia. Its leaves contain alkaloids such as mitragynine and 7‑hydroxymitragynine that act on opioid and other receptors. Effects vary by dose, product, and individual factors. While some people report desired effects like stimulation or relaxation, a range of side effects is possible — from mild and short‑lived to serious and medically urgent, especially when combined with other substances.
This page summarizes commonly reported adverse effects, factors that increase risk, and signs that require prompt medical attention. It is not medical advice.
Commonly reported side effects
Frequency and intensity vary. Using higher doses, using on an empty stomach, dehydration, or combining with other substances can make these more likely.
Nausea & vomiting
Often dose‑related; more likely on an empty stomach.
Dizziness or lightheadedness
Can impair coordination; avoid driving or operating machinery.
Constipation
Similar to other substances with opioid‑like activity.
Sweating, flushing, itchiness
May appear at higher doses.
Dry mouth & increased urination
Hydration can help mitigate symptoms.
Drowsiness or insomnia
Paradoxical effects can occur depending on dose and timing.
- Liver injury (jaundice, dark urine, severe fatigue)
- Elevated heart rate, blood pressure, or rhythm disturbances
- Seizures (risk increases with certain medications or mixes)
- Severe dehydration and electrolyte imbalance from vomiting
- Serotonin syndrome when combined with serotonergic drugs
- Trouble breathing, blue lips, severe confusion, or fainting
- Chest pain, irregular or very fast heartbeat
- Seizure, severe agitation, or inability to awaken
- Yellowing of skin/eyes (jaundice)
In the U.S., you can contact Poison Help at 1‑800‑222‑1222 for immediate guidance.
Short‑term effects
Onset and duration vary by product and dose. Short‑term adverse effects often include gastrointestinal upset, dizziness, sweating, and changes in alertness. Driving or tasks requiring focus can be unsafe.
Long‑term considerations
- Tolerance and dependence with frequent or high‑dose use
- Withdrawal on abrupt cessation (e.g., irritability, insomnia, muscle aches, runny nose, GI upset)
- Potential liver injury reports; monitoring is prudent if using regularly
- Possible impacts on hormones, appetite, and mood in some users
Interactions and contraindications
Avoid mixing with
- Alcohol and other central nervous system depressants
- Opioids, benzodiazepines, sedative‑hypnotics
- Stimulants (e.g., amphetamines), cocaine
- MAOIs and certain antidepressants (serotonin syndrome risk)
- Drugs that strain the liver (additive toxicity risk)
Use is higher‑risk or not recommended for
- Pregnant or breastfeeding individuals
- People with liver, kidney, or significant heart conditions
- Those with a history of substance use disorder
- Individuals taking medications with known interactions
Practical safety tips
- Avoid mixing with alcohol, opioids, benzodiazepines, or other sedatives/stimulants.
- If you choose to use, avoid daily use; take breaks to reduce tolerance and dependence risk.
- Stay hydrated; consider light food to reduce nausea.
- Do not drive or operate machinery while under the influence.
- Source cautiously; products can vary widely in potency and purity.
- If you experience yellowing eyes/skin, severe abdominal pain, dark urine, or extreme fatigue, stop use and seek medical care.
Withdrawal support (if stopping after frequent use)
- Gradual tapering can reduce symptoms; abrupt cessation may be uncomfortable.
- Sleep hygiene, hydration, gentle movement, and social support can help.
- Speak with a licensed clinician for individualized guidance.
Frequently asked questions
Is kratom safe?
No substance use is risk‑free. Safety depends on the person, product, dose, frequency, and combinations. Serious adverse events are uncommon but have been reported, especially with other drugs.
Can kratom be addictive?
Yes. Repeated or high‑dose use can lead to tolerance, dependence, and withdrawal symptoms when stopping.
Is overdose possible?
Toxicity risk increases with high doses and combinations with sedatives, opioids, or other substances. Seek urgent care for breathing problems, severe confusion, seizures, or chest pain.
Is kratom legal?
Laws vary by country, state, and locality and can change over time. Check current regulations where you live.
Evidence snapshot
Summary informed by reports from U.S. poison control centers, public health advisories, peer‑reviewed case reports and reviews on kratom pharmacology, toxicity, and dependence. Research is ongoing and not all effects are fully characterized.