I don't knw why i feel sleepy during my class lecture even many times in examination. It has been since i was in class 8 and now i m 1st year mbbs student bt this problm is still with me.also i go through sleeping paralysis most of my night.excessive dreaming also Bt when i consult to doctor. He gave me medicine. Now i dont feel any drowsiness bt i hav lost my concentration. I cnt listen to them more than their 3 sentence nor i cn correlate their words.