"i started taking this when i was 17. i was struggling in school, barely passing my main subjects.  within 10 days of taking adderall, i could tell it started to work.  i could concentrate on listening to my teachers.  my brain slowed down enough where i could do my homework.  it all started to make sense. my self-esteem improved with my grades improving to 85&#039;s and above within 6 months.  side effects have been loss of appetite, not needing to sleep as much. unfortunately, i&#039;ve had bright red blood in my stool this past month.  it also happened about 6 months ago.  i will be discussing with my doctor."