How many hours can a certain amount of caffeine keep you awake for?

How many hours can a certain amount of caffeine keep you awake for?

You can check the answer of the people under the question at Quora “how long does coffee last to keep you awake

0 thoughts on “How many hours can a certain amount of caffeine keep you awake for?”

  1. Don’t go self-medicating with caffeine (by this I mean tablets)!
    Caffeine has many effects besides the “keeps you awake” story! It affects your pulse rate, body temperature, blood flow to the skin & extremities, blood pressure, blood sugar levels, stomach acid secretion and production of urine. Any and all of these can affect your ability to sleep.
    As with many substances, there are fast-metabolizers and slow ones, and this will be affected by what else you’ve recently consumed. So unless you’ve a good handle on this, don’t mess with it.
    Coffee at work used to make me restless, irritable, give me indigestion and sleeplessness. But now, good quality coffee will let sleep peacefully.

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  2. There is no generic one-size-fits-all answer for this. It varies by person. In my own case, a single cup of coffee kept me up for 48 hours straight. But that was after I had totally abstained from drinking any caffeine for 6 months straight. Nowadays, after drinking at most two 13.7 fluid ounce bottles of Starbucks Caramel Frappuccino a day for over a year so I’ve developed a tolerance for that amount of caffeine, it maybe works up to 6 hours. Maybe less.

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  3. There isn’t an answer to this question- other than ‘it depends’.
    Different people are affected by caffeine (or other substances) in different ways. The manner in which caffeine affects someone can also be influenced by a number of other factors, such as the manner in which its imbibed (drank), whether its accompanied by other substances (and if so- what), how tired the person was before the caffeine was taken- and what their tolerance for caffeine is.
    If someone habitually takes large amounts of caffeine, and is exhausted when they take a quantity of caffeine- its entirely possible that they could fall fast asleap immediately after taking the caffeine- all the while their blood caffeine levels could be off the charts……….
    So- really, it depends on the person, the circumstances they are in- and their physical state prior to taking the caffeine.
    If I’m tired and trying to stay awake- I find a drink of ice cold water- and lowering the temperature in the room I’m in (or the car) so its chilly- is more conducive to keeping me awake- than is taking a coffee (but the best way of keeping awake- is to have a short nap- for 10–15 minutes- and then getting back to whatever it is that I need to do).

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  4. Awake as in: not sleeping?
    about 6 hours max with a heavy dose.
    Make no mistake, reaction times and cognitive abilities will still be impaired. Also an unpleasant “buzzing” feeling can result.
    I always say: Caffeine is for waking up after sleep or at least a nap, not for keeping you awake.

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  5. well,many of us try being awake for different things and i can tell caffeine is the best thing for that.I always have more caffeine during my exams and it helps me keep awake the whole night before exam.However if u continously start doing it for days even caffeine cant help you being awake.

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  6. Someone who consumes 40 milligrams (mg) of caffeine will have 20 mg remaining in their system after 5 hours. Levels of caffeine peak in the blood within about 15–45 minutes of consumption.

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  7. i have no idea about it because i did not use yet,but i think is a matter of convincing your mind .i mean that if you convince your self that u cane be awake for long hours u by using caffeine u will and if don believe on that you will no longer be .

    Victor Allen’s

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  8. Be careful with using caffeine for extra waking time, sleep is like a bank, you need to pay back the time you gained at some point…

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  9. Totally dependent on your body chemistry and your caffeine sensitivity, age, health, job, physical activities, genetics and how much rest you had beforehand. Assuming you’re talking about taking your maximum dose in one serving in the morning id say 12 hours maximum if you’re extremely sensitive. But the ceiling is about 3-6 hours for the average person, your body metabolizes it in that time period.

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