It has been compared to LSD, marijuana and ecstasy. But it is mostly legal in the USA.

Kratom is a tropical tree Mitragyna speciosa) related to coffee that is native to Southeast Asia. Leaves from the tree have been used for centuries as a traditional remedy for pain. The leaves can be eaten raw, but are usually crushed and made into a powder. The powder is then consumed in capsules, smoked or brewed in teas.

According to the U.S. Drug Enforcement Administration, consumption of kratom in low doses produces stimulating effects. However, in large amounts it acts as a sedative, and can lead to psychotic symptoms, as well as psychological and physiological dependence.

According to the available science kratom, although having effects on opioid receptors in the brain, is distinct from classical opioids (e.g. morphine, heroin, oxycodone, etc.) in its chemistry, biological effects, and origin. Used in raw plant form, it does not appear to produce the highly addictive euphoria or lethal respiratory depressing effects of classical opioids.

Kratom’s popularity is growing, among concerns that it could become a legal drug used for recreational purposes.