This has been happening to SWIM a lot lately, and it seems just about every strong upper does it... speed, coke, propylhexedrine, etc. SWIM typically stays up all night doing it, stops at some point and of course waits to come down completely. No matter how long he waits, he ends up with severe insomnia when trying to get to sleep, including nasty panic attacks that sometimes keep him awake an additional full night and even into the next day! It doesn't matter how exhausted he is, he cannot even get close to falling asleep. It's horrible, really a nightmare. Does anyone think I am throwing off his brain chemistry from the stims, and the insomnia/panic is related to that somehow? Anyone else have this sort of issue? Most people seem to drop right off to sleep after a run of stimulant use, so I feel kind of alone here. Based on past experience with opiate agonists, he thinks his regular use of kratom may be exacerbating the problem.