Hello there - I have pd and am 73 on sinemet 4 times a day
Welcome to this forum you came to the right place for help, I am not medical in any way so I think the best place for help with chemo and parkinson's would be to call the Helpline above it's free they will put you onto the right people they are very nice so don't be shy.
in the meantime best of luck with Mum
xx oldboy 73 years young fell walker. XXX