chemical treatment, ie L-dopa, is useless: one develops a tolerance for the drug and increasing drug doses only make it more inefficient. deep brain stimulation is the way. also lack of sex in late life leads to lower dopamine levels, thats why oldies start to shake: one could gift their parent a stripper on their birthday, but u would have to worry about mitigating cardiac troubles if any occured. old age is just a mess: cataract, carcinomas, lower bone mass and frequent fractures, a fucking hell to go through