"i have been taking focalin since the 6th grade. my add has improved. everyday, i feel jittery and i shiver uncontrollably. my stomach hurts a lot and when i don&#039;t take it consecutively, my appetite goes away. i either eat nothing or everything in sight. i&#039;m naturally skinny but when i don&#039;t eat,i&#039;m afraid people will think that&#039;s why i&#039;m skinny. i am insanely tired everyday, and my medication used to pick me up but now it doesn&#039;t. i hate coffee and i&#039;ve tried caffeine tablets (they make me 3x more jittery). i have abused focalin before. i tried to get high on 3 different occasions, but they all have been unsuccessful. i have terrible anxiety."