United States Drug Enforcement Administration

Kratom is a tropical tree native to Southeast Asia. Consumption of its leaves produces both stimulant effects (in low doses) and sedative effects (in high doses), and can lead to psychotic symptoms, and psychological and physiological dependence. Kratom leaves contain two major psychoactive ingredients (mitragynine and 7-hydroxymytragynine). These leaves are crushed and then smoked, brewed with tea, or placed into gel capsules. Kratom has a long history of use in Southeast Asia.  In the U.S., the abuse of kratom has increased markedly in recent years.

Thang, kakuam, thom, ketum, and biak

Mostly abused by oral ingestion in the form of a tablet, capsule, or extract. Kratom leaves may also be dried or powdered and ingested as a tea, or the kratom leaf may be chewed.

At low doses: increased alertness, physical energy, and talkativeness. At high doses: sedation Addictive: causes hallucinations, delusion, and confusion, nausea, itching, sweating, dry mouth, constipation, increased urination, and loss of appetite. Long-term use can cause anorexia, weight loss, and insomnia.