How to reduce sleep while studying?

Don't procrastinate: There is no legal way for you to be taking medication to reduce sleep for the sole purpose of studying. Decreasing your sleep while studying is likely to lead to poorer performance than if you had not procrastinated in the first place. If your difficulty is with procrastination, please get into therapy to deal with that. Please don't forget the crash from caffeine is likely to impair your performance in the long-haul anyway. It is certainly not helpful in this situation. Would you want your surgeon to cram for your operation the night before he operates? Would you want him to consume a lot of caffeine? Worse yet, would you like him to be on stimulants while operating on you? Please learn to live life without these crutches.