While there is no absolute guarantee the tics will cease, they almost always do. Since medications like Adderall (adderrall) don't maintain a steady level in the bloodstream, but rather are entirely metabolized dose to dose, the cessation of the medication can occur quickly. Follow the advice of the prescriber; you'll see that the discontinuation occurs almost immeduately.
My 4 year old son was put on adderol today. I am scared it has zombie effect on him. Did it do that to your little girl?