Amantadine alternatives?

Hi everyone,

After being taken off Sinemet for freezing, my mum was put on Amantadine 3x a day a year ago now.

Since starting Amantadine she has had increasing hallucinations. They didn’t bother her much initially. However they are now causing her some distress.

Her appointment with her consultant has been cancelled, rebooked and is now not until September. It has been 1 year since the last appointment.

Can anyone offer any advice? Or similar experience with this particular medication? She is very keen to come off it.