Over the last decade a substance known as kratom has grown in popularity, appearing on the shelves of gas stations, smoke shops, coffee spots and tea stores.

The federal government is seeking to restrict a synthetic kratom product that is already banned in Arizona but easy to find ...

Kratom is an alkaloid-containing drug prepared from the leaves of a Southeast Asian tree (Mitragyna speciosa), which has long been recognized as having the potential to alleviate opioid withdrawal ...