coffee makes me more sleepy

Coffee contains caffeine can stimulate the nerve center of people who generate excitement, but a long time threshold stimulation (min stimulation) in relation to big, you must use a larger dose of coffee to stimulate the hub, in accordance with normal doses not only failed to make people Instead, stuffy people excited.

i am not a coffee drinker, really. i only drink coffee when i feel sleepy and this happens during the early afternoon. if i don't drink coffee to keep me awake, i would probably be asleep on my desk. sometimes, i go out of the office for a while and take a breath of fresh air from the windows in the aisle. i spend a few minutes there and then go back to work after.

I have that same problem!!! Coffee and any type of caffeine doesn't do anything for me anymore...I can fall asleep after having a large black starbucks coffee...when I worked at Barnes and Nobel I use to have 5 or 6 shots while closing to stay awake and still be able to pass out the minute I got home from work.