Does coffee really keep you awake??

I don't drink coffee so probably shouldn't respond to this but I have known coffee to effect different people in different ways, one of my sisters and my oldest son can drink it day and night and it doesn't keep them awake. My Mom and #2 son can't seem to drink it for several hours before bed time or will be awake half the night. I drink Diet Pepsi for the caffine effect but have drank it for so long I can't live without it and drink way too much, day and night :(

I can't get to sleep anyway so coffee doesn't really matter! lol It does give me a little buzz of mind stimulation though and for that I am eternally grateful! xxx

I'm definatly not a big coffee drinker. But on those mornings I have an exam, I drink it and it really keeps me awake. At times it keeps me so alert, that I can feel my heart beating through my body. And when I come down from that, the effects are terrible. I become so tired that I usually don't eat until the next day.

I can drink coffee, or any other caffeinated beverage at any time, any day. The only effect it gives me is either taking away my headache (from lack of caffeine... lol!) or keeping it away! Yay!

Coffee doen't wake me up..It just gives me the jitters..I drink tea all day long and I can still sleep..I can even take a caffeine pill and still can sleep..I would love to find something that would keep me awake.

Yes, I believe it does I use to drink it late in the evening when I was younger and then I just couldn't fall asleep and there wasn't nothing else to put it down to either, other then the coffee

The only thing that coffee does to me is keep me awake but not due to the caffeine but due to the fact that I have to pay extra visits to the toilet in the night, it goes right through me! I can't drink before I go to bed because I'll be up during the night wanting to go! Such is my bladder grrrr I also find that if I eat cheese that also stops me sleeping, for some reason! But now I've switched to decaff as I can't drink ordinary coffee any more and it tastes the same to me xxx

Coffee is really no longer effective for me, but I think it has more to do with working at Starbucks for over 3 1/2 years than the fact that it never effected me. I used to get a lot of energy from the caffeine in coffee, but that is no longer the case. I am at the point where I can have a cup of coffee, roll over in bed, and fall asleep almost instantly. I drink coffee drinks more for the taste now than anything else.

I have never had a problem with coffee thank goodness. I did use decaf for a while but gave it up when it started bothering my stomach and went back to regular coffee. There a lot of times I will drink a cup just before going to bed and will go right to sleep. I drink between 12 and 20 cups a day especially in the winter. I also drink a couple of Pepsi's so I don't think caffeine is a problem for me. I can also, in the summer, drink water and non caffeinated drinks and don't get a headache which is a good thing.

Coffee doesn't keep me awake. I also drink coffee after dinner and I still get to sleep whenever at the time that I wanted to. What keeps me awake is drinking coca-cola so I avoid them especially at night. Coffee sort of relaxes me too. But it also seems to deepen my concentration so I take a lot of coffee when I am in the office.

Yea, unless I want it to, coffee has pretty much lost its effect on me. I can drink coffee than sleep right away or drink nothing and have insomnia for hours.

I take coffee only after I wake up and that too after brushing my teeth. So there is no chance of the coffee waking me up. But in the evening after 6 if I takecoffee or for that matter Tea I cannot sleep in the night till about 11 0r 12. I usually sleep at 10pm. I have to get my minimum 8 hours sleep. I get up around 6.30 in the morning... so I never drink coffee in the evening even if I am visiting..

Just like you, I'm not affected by coffee even if I take it before I go to sleep. I like coffee because of its aroma and taste and I can take it anytime I want.

It definitely does not work. Well... for my anyway. I drink normal coffee after I wake up and it does nothing. I end up sleeping in the car as my dad fetch me to school haha... When at night, I sometimes drink Starbucks coffee and it also does nothing. I can still sleep without forcing myself. I sometimes wonder if there's really a scientific evidence between coffee and keeping you awake.

if you drink enough of it it will, coffee has cafeine so it keeps you wired and then that means you can't settle down and relax, now if you are not a coffee drinker that could happen with your first cup, if you are a heavy coffee drinker it might take 10 cups before it hits, I can't drink that much coffee it makes me too jittery.

I can drink coffee just before I go to bed and still sleep but I use creamer and sugar in mine so it does not taste like a strong cup of coffee

Coffee does not wake me up or keep me awake. I drink at least 4 cups a day but I can go without. I don't sleep better without it at night in fact if I don't have a cup before bedtime I tend to sleep badly. I'm so glad I'm not alone. When I tell people this they look at me like they don't believe me...lol. I've had people tell me they cannot drink coffee after 3or 4 pm and some even have to stop drinking it from lunchtime on if they want to sleep. I decide to research this topic and I gave myself a bit of a shock. Here is a list of the effects of caffiene on the body... The following are commonly attributed to over-use of caffeine: 1. Stimulates your heart, respiratory system, and central nervous system. 2. Makes your blood more `sludgy' by raising the level of fatty acids in the blood. 3. Causes messages to be passed along your nervous system more quickly 4. Stimulates blood circulation 5. Raises blood pressure 6. Causes your stomach to produce more acid 7. Irritates the stomach lining 8. Makes digestion less effective by relaxing the muscles of your intestinal system 9. Its diuretic effect caused increased urination 10. Stimulates the cortex of your brain heightening the intensity of mental activity. This can result in a temporary feeling of alertness and, in the short term, banishes drowsiness and feelings of fatigue. In those who already have high levels of anxiety the heightened intensity of mental activity can produce unpleasant effects. 11. Affects the length and quality of sleep. Heavy caffeine users suffer from sleep-deprivation because their nervous system is too stimulated to allow them deep, restful or prolonged sleep. 12. The American Medical Journal has reported a correlation between caffeine and decreased bone density or osteoporosis in women. In addition to the above effects prolonged or heavy caffeine use can produce more uncomfortable experiences: 13. `Caffeine nerves' a jittery feeling with shaking hands, palpitations, and wobbliness in the legs. 14. Caffeine addiction which involves nervousness, irritability, agitation, headaches or ringing in the ears. 15. Causes your adrenal glands to release their hormones into your bloodstream 16. Causes blood sugar, or blood glucose, to be released from storage through the effects of the adrenal hormones. This gives you a temporary lift but… 17. …requires your pancreas to over-work. This is because your pancreas now has to produce extra insulin to reduce this extra blood sugar. Once the extra insulin has 'mopped up' the extra blood sugar your temporary lift from the caffeine ends. Your vitality level is back to normal. However in heavy caffeine users the pancreas, in time, becomes over-sensitive and over-zealous. Now it begins producing too much insulin – it 'mops up' not just the excess blood sugar but the blood sugar you need to feel alert and energetic. The initial effect of this is a let-down effect and a craving for more caffeine to give you a further boost. A later effect can be excessive and chronic tiredness, even on waking in the morning. Some people find that many of the psychological complaints common to reactive hypoglycaemia (the emotional yo-yo effect, shakiness, palpitations, weakness, tiredness, etc.) disappear within a few days of stopping caffeine. This info is from the link below and there is more info too. http://www.pe2000.com/caffeine.htm

Coffee affects me the same way it does you! I does not make me hyper, nor does it keep me awake! As a matter of fact, lots of times I have to drink a cup of coffee to relax, before I can get to sleep!

of coures,it keep me awake all the time for half day,

It does not keep me awake, it actually puts me to asleep. :D And my doctor prohibited me from drinking coffee because it makes my stomach hurt. Sugary foods/drinks are more effective for me...