A few times people mentioned having a weak stomach, and it reminded me of something that crossed my mind only a few days ago. I'm on the same page as many of you with all this(primarily the medical concerns). i actually found this page trying to google the correct spelling of seretonin and one thing i thought about was the upset stomach. if even adrenaline is increased, could the upset stomach have anything to do with over-production of stomach acid? possibly from the anxiety? could that also translate to gastrointestinal disorders? and blah blah blah i got you on the right page by now. just another smoker lookin to make sure i'm not doin it with my head up my @ss. I also see the pros of being in control..