I also suffer from low blood pressure. I think PD is to blame but also A fib. Lightheadness is part of ortho static hypertension. You can faint when your BP gets that low. I stay home if it's low. You don't want to fall. Who knows what you might break.

My HWP had low blood pressure at 2 recent office visits. First at PCP and also at Cardiologist. Cardiologist cut one of his heart meds (Entresto) and that seems to have worked. My husband also suffers from neuropathy where his hands, feet, face burn and turn red. No dr seems able to address this. He was convinced that one of his meds was causing it. I don’t think so, but to prove it to him, we stopped ALL meds for 3 days. We are just now starting to add them back. Will let you know if BP becomes a problem as we add meds back.