The solution to this could be as simple as eating something differently for lunch, but I thought I would ask anyway.
I am so sleepy after lunch! I have a desk job that keeps me busy, but after I eat lunch, I just want to lay my head down and go to sleep! This is normally when I would have downed a Mountain Dew or hit the vending machine for some chocolate. Any advice?

Sorry, everyone already took my good advice. I know my job tends to seem boring after lunch so that is when I get sleepy too!