Lisdexamfetamine
"My 10 yr old daughter was put on low dose (20mg) of Vyvanse for ADHD.  Her ADHD was severely affecting her school work.  Positive:  immediately teachers and I noticed she could focus, sit more still, and initiate her own homework, etc...  But it's the NEGATIVE side affects that seriously concerned me.  She went from a cheerful, joyous girl, to a melancholy zombie.  Even worse, she became more and more depressed & irritable at night.  She said she felt like she lost all personality and had a sadness that she didn't understand why.  I can not emphasize enough how scary it was to see her whole personality change, and that was not worth any benefits.she got out of Vyvanse. Other side effects:  loss of appetite, joint/muscle pain, mouth twitch."