Thank you both for your replies, the doctor and the rest of the family wants her to go to a neuro for an experienced evaluation/diagnoses but unfortunately there is no way on this earth that she will go, we have all tried really hard to get her there but nothing has worked and I am sure that nothing will.
Medication wise, she takes one pill directly before breakfast then about 10 minutes later she starts shaking, then at night 2 tablets just before she goes to bed.
She is not very active during the day mostly sitting and does a lot of reading, only moving when necessary, the doctor has been very slowly increasing the meds over the last 3 months and she is due to see him again in about 10 days.
Her symptoms started about 4 to 5 months ago, it was very hard to get her just to see her local doctor then, we have trouble getting to her attend followup appointments now.
She doesn't have any constipation, she is slow moving but at 90 years I think it is more age related slowness than anything else.

She did have a fall and hit her head hard on a concrete path about 9 months ago, she was taking to hospital and a CT scan was done and there was no problem found, after that fall we noticed her short term memory has been becoming increasingly worse over time, she was good before the fall .

Thank you for your interest.