TEXT IN IMAGE APPEARS LATER IN ARTICLE. Kratom is a relatively new drug to the US and Europe. It has been used for many years in Southeast Asia as an anti-diarrheal medicine, a painkiller and a recreational drug. Kratom is the popular name for a tree and the drug comes from its leaves. The drug may be bought in leaf form but in this country, it is more likely to be purchased as a capsule filled with powdered leaf material or a chopped up form of the leaf that can be used for tea or smoking. Most people ingest the drug.