My main concern is what meds do you currently have her on as well?
Losing 32lbs could be quite a problem for a 9 year old. What was her height and weight before taking meds? Is she on any medication for seizures? Absence seizures can be mistaken for ADD. Perhaps she should be evaluated by a pediatric neurologist.
I agree your Doctor is the one to ask about which Med to take, Does your Daughter do plenty of outside activities,most children with ADD or ADHD thrive outdoors So making hiking, swimming cycling,,nature study skating and other non-competitive activities part of the Family routine.Experts also advise parents to focus on the positive side of a childs behavior catch her doing something good and praise her. .channel her energy in constructive ways.Food supplements have been shown to work, VitB Complex and Vit C with antioxidants and Fish oil, I hope you daughter feels better soon.
I would talk to a doctor about this one... You definitely do not want to jeopardize her health or her spirit!