How long does it take to get out of the system after stopping?

My daughter has been taking Reglan for increasing her milk supply for about 4 months. She is so depressed and just cannot function and she went to the doctor and they put her on Lexapro and Xanax. She still is getting better so she has decided to stop the Reglan. How long does it take to get this "junk" out of her system where she can start to feel normal again. This is dangerous stuff. Thanks for any help out there. B.A.