Kratom
Kratom is the common name for a plant-based, herbal substance that can produce opioid- and stimulant-like effects on the body. Kratom and Kratom-based products are currently accessible in many regions, but it is not approved for any use by the United States FDA.
Kratom comes from a tree native to Southeast Asia and some of the naturally occurring chemical compounds in the plant have been reported to have pain relieving properties. Kratom has been reported as a means of managing the symptoms of substance withdrawal and cravings - particularly relating to the use of opioids.
Research on kratom is still relatively new - the use and misuse of kratom has increased significantly in recent years.