Kratom is an herbal supplement that has properties similar to other opioids. It is not recommended as a treatment for pain at this time due to lack of research, harmful side effects, and product contamination. 
Kratom is an herbal supplement known to have both stimulant and calming effects. It may also have pain-relieving properties similar to opioids. However, kratom cannot be used as a substitution for prescription pain medications, because studies on its safety or usefulness in humans have not been conducted. Its use is banned in some countries and US states due to potential for abuse. Moreover, some kratom products were recalled due to contamination.