Are you getting it all at once or as an infusion? Considering this is given as an infusion over 40 minutes, this seems to be a pretty mild dose consistent with mild analgesia and well bellow the recreation and dissociative doses based on all the charts I just pulled up, but I'm not personally experienced with K ;)
I've had K infusions for neuropathic pain, in comparable dosage rates, for up to 7 days at a time.
You certainly notice the effects of IV K. So do other people when you start to talk to a hairbrush. It's a bit draining after a few days though, and not terribly fun.