Hello Stargatebabe,you can rely on turnip for sensible advice , I understand both
your Father and your fears,but be assured there will be drugs that will greatly
Improve your dads condition it may take a while but you will crack the problem.
I recently was lucky enough to have Duodopa ,this consists of a external pump
which delivers levodopa straight to the small intestine,it is life changing ,I am much improved, but it does not help with depression and can vary each day in effectiveness ,but easily a improvement of 90% in my case.
Be strong you will be fine, Kindest Regards