Everyone has a completely different reaction to stimulant medications. My son has a horror story for Adderall, but did well on Concerta for many years. It comes down to genetics, metabolism, and individual neurochemical needs. I would, however, be concerned about the fact that most people do well on one type of ADHD stimulant or the other, but not both. If she did really well on an amphetamine-based stimulant, she may not respond to methylphenidate. Of course, you don’t know until you try.
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism