I just want to piggyback on LFAC's great response. To stop drugs so abruptly after five years is asking for trouble. I had to stop Mirapex when pregnant in one week and it was hell, yet I had only been on it for a few months.
There is a serious adverse effect known as Neuroleptic Malignant Syndrome that can happen when any PD drug is stopped too abruptly. It can be life threatening so good to know the basics.
Finally, there is a very helpful forum on the National Parkinson Foundation website where you can ask for a pharmacist's advice. You may want his input on how to help your mom through this. The pharmacist there is Mark, and he knows our side of it as he has PD too.
Ask the Pharmacist