The right thing to do for your child is to not let her ingest any more meds.
Psychiatric drugs are extremely destructive even though they don't appear to be.
The fact that it may quiet her down a little is doing her no good.
The fact that two doctors agree that she should be on that stuff does not make it right.
Here's a link that may be helpful and a little more insight into what I'm getting at here.
This is a nonprofit organization thats been following this line of stuff since the 1960's.
I feel for your child!