Frankly, if she has anxiety, I would try and deal with the cause which is probably ADHD
. The best way to deal with ADHD
is to really understand it. One book I have been recommending to do so is the, "ADD / ADHD Answer Book by Susan Ashley.
Not sure where you are getting your information for meds, but if you haven't done so, I would look into a pediatric psychiatrist who specializes in ADHD.