>>14187522>I can't stay awake or study as long as I want to unless I doSomething is wrong with your body then, either diet, stress, female hormones like cortisol and estrogen, lack of proper sleep at set time each day, etc.
Caffeine is just crap, in that it doesn't really work well. If you are having to study that hard, you are probably in over your head.
A student shouldn't need to spend more than an equal amount of time outside of a course doing work/studying. If you are taking 15 credit hours, you only should need 15 hours outside of class to complete the work or study.