I am raising twin difficult children (girls). The older of the two is really going through some things. She takes Vyvanse (50) for ADHD. Also has Learning Disability (LD)'s. They turned 11 in Oct. All of sudden older difficult child has had a personality change. She is very angry about everything. The anger is not the only problem but the response is over the top. In other words she get extremely angry over the smallest things. The anger and the situation don't go together. This kind of coincided with the change from Adderal to Vyvanse but I don't know if it is the medication or puberty kicking in. In addition her younger sister (by 6 minutes) knows all the buttons to push. She literally lights the fuse and then sits back to watch it blow. I was just told to try her on Zyprexa in addition to the Vyvanse. I am leary. Any suggestions for me. They both have Learning Disability (LD)'s, but the older probably received most of what bio mom was doing in utero. Her therapist seems to think it is not the medication. I don't know what to do. The Vyvanse controls her in school, I'm not getting any calls so far. Any suggestion as to my next step would be appreciated.