Hi Michael,

Many thanks for your reply. Before your reply I found on some website (which I don't recall but it looked a thrustfull and professional one) that drowziness and confusion are symptoms of PD. I asked this because my father was complaining about feeling like he was drunk and I was getting scared maybe he didn't have PD but something worse. I already suffered enough when a neurologist diagnosed him with PD ... if he would have something worse I wouldn't know how to deal with it.