I'm not sure who can see this. I have no idea whether I have high or low blood pressure, but dizziness is the worst of my problems. I am eighty, and was diagnosed with Parkinson's a couple of years ago. Until diagnosed ( after taking my wife's advice to go for a check), I never felt ill in fifty years. If I sit in a chair and mean my head back, I get close to fainting. Instinct tells me prescribed medicine cause symptons.