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I used to often wake up early, have a cup of coffee, and then fall back asleep for an hour or two. But the caffeine in coffee still had the normal stimulatory effect at other times.

Now I drink very little caffeine, but I still have that nighttime sleep pattern -- 5.5 hours asleep, 1.5 hours awake/alert and up, 1.5 hours asleep, and then I'm awake and refreshed and ready for the day.

Happens to me all the time. I don't know if it's physical or psychological but I have what I call a paradoxical reaction to caffiene - it puts me RIGHT to sleep.

Also, it's not the sugar, at least in my case, because I don't use any. I'm diabetic and well aware of hi- and low-blood sugar symptoms. This is different at least for me.

Some quick searching and skimming turned up this article:

http://www.chicagoreader.com/chicago/how-does-caffeine-affec...

when I eat a big meal or lots of sugar.

maybe it could have been sugar in the coffee or something.

Ask HW: is this Normal?