I am 25 years old, student of BE Mechanical, I sleep everyday at 12pm and wake at morning 7am then I fresh, after I take my breakfast POHE only, then after one to two hour I am getting sleepy mood very strongly, this happens everyday, that's why I can't concentrate on my study, and I sleeped up to 12 to 1 pm, kindly tell me what is the reasons behind this SLEEPY matter, I hate this habit, and this problem will happened only in exam periods. Provide me medicine name or resolution. I don't have much money to go doctor and paid there consultant fees.