I've taken it a handful of times within the recreational dose range. It never did anything but make me sick or nothing at all.
"Recreational dose range" is just a range. You might have overdid even in whatever dose you were taking it. I'm not defending kratom though because it could be just as likely that your body just doesn't like it. Iyam that's a good thing because kratom sucks imo and is just a substance that is used to be abused.