How Likely Am To Develop Dementia With Family History Of Dementia And Parkinson S Disease?

Only child, attracted bi polar disorder currently being treated with lithiam 800mg tdsx2 at night. Mother diagnosed with frontal lobe dementia with parkinism with some soft extra pyramidal signs. I know the risk of drug induced parkinism is high, as I ve researched the implications.. & have been sensitive to depekote in the past when I experianced restless legs, and rapid hair loss. Been treated with prosac and seroxat in my early teens. Lithiam levels are at at a therephueptic dose, been experiencing excessive daytime sleepiness, urgent toilet needs headaches more frequently and blured imparted vision almost two years. Do u have any idea the likeliness or possible percent I may develop Some form of dementia? Please help. Kind regards janet