I feel sleepy when i start studying. what should i do.? to improve memory and be active while studying instead of feeling sleepy.

Coffee: If you are not an habitual drinker, 25 mg will help. Unfortunately, the effect decreases as time goes by. Major league stimulants like Ritalin (methylphenidate) might be used only for add.

Generally,: Active studying ideally involves something of interest to you. If not, it will be hard. If so, be hydrated ; in good physical condition generally. Perhaps study with a friend - question each other and discuss what you learn. This can increase interest levels and stimulate you. Pick a good time, take brief breaks, have good light, seating and temperature in the area. Learn study skills. Good luck!