It depend's on someone's definition of "addictive". While no one is fiending for some kratom and stealing from Grandma to buy more, thousands of anecdotes of WD symptoms when cold turkey quitting. I def wouldnt compare kratom WD to hard opiates however I took a naltrexone with 4 months chronic kratom use in me and I ended up in the ER with precipitated WD.
@Fertile While the MOR affinity may be partial, it was significant enough to feel like morphine WD (which I have been through). Again to be fair, that was brought on by the injestion of an opioid blocker. I quit kratom a couple weeks ago and it couldnt hold a lick to opiate WD,