Kratom Now an Opioid, FDA Says

FDA scientists analyzed the chemical structures of the 25 most common compounds in kratom and concluded that all of the compounds share structural characteristics with controlled opioid analgesics, such as morphine derivatives. They also found that compounds in kratom bind strongly to mu-opioid receptors, comparable to opioid drugs.

“Based on the data we now have, we feel confident in calling these compounds opioids,” Dr Gottlieb said.

https://www.medscape.com/viewarticle/892375