I get what you're saying, but I think my experience is almost the opposite...when I'm sick I tend to get pretty depressed. Sure, my mind isn't racing, but I'm not in a good place either. My hangovers are really mild because I never get too drunk (hate throwing up!) so I don't feel sick at all, not even a headache. It's not like I'm distracted from my own thoughts, or even focused on taking care of myself...it's more just like my mind has been slowed down and tuned to the perfect pitch. I'm able to work on my dissertation etc., whereas usually my thoughts are racing so fast it implodes on a daily basis...maybe I need to take some sort of sedative everyday! just kidding...that sounds unwise