Not sure how long a person can go without sleeping. I have taken everything under the sun to try and sleep. I think I dosed off for a half hour last time I tried, but I am absolutely wide awake and feel refreshed like I have just had the best night of sleep. Hmmm.... I know what this means I guess. Now that I come to think of it. I didnt eat at all yesterday. Not hungry either. How weird it is that our bodies can just go without things that usually are so manditory to function and yet I function better without them at these times.