A cup of coffee make me more sleepy

Since you have felt more sleepy after drinking coffee, so having tolerance is probably not the real reason. Maybe what making you stay up or be sleepy depends on lots of facts such as pressure, diet, mood, having sports, wearing pretty clothes, being awarded,etc. You will feel sleepy after having sports even if you have had coffee or you will stay up when having great pressure even if you have not had coffee. So having coffee is just one of many facts which may influnce your sleeping=)

same here..lol.. maybe it's because we're immune already in caffeine..:D

I don't drink coffee but I know my hubby drinks so much of it because of his job that he says it really doesn't phase him too much.

yeah, generally coffee will give the sleepy feel....... where the tea refreshes up.

I agree with you choy, I don;t drink a lot of coffee, and often forget it's effect on me, so forget to ask for decaf. The more coffee I drink. the sleepier I get. I drank a couple cups of my aunts coffee while visiting family over breakfast before heading home yesterday and couldn't make myself keep my eyes open by the time we got in the car and crashed out the whole trip home. Anyways, anyone else have anything like that, not necessarily coffee, but i was just curious as to what were things that maybe effected you way different from the mainstream.