The Doctor needs to get your Mother off these tablets and on to something more suitable. Contact the Neurologist or their Secretary to give you a new prescription for your Mother. Do you have a Parkinsons Nurse you can speak to ? If so talk to them as well about the problem, they can offer advice and give you help in getting the right medication for your Mother. I took a drug which gave me hallucinations and made me say things that weren’t true, it was horrible for my wife as she bore most of the brunt of it all.