Co-q-10

Never heard of that. What is it, a blood pressure prescription med?

It's a mitochondrial based compound involved in the electron transport chain. Won't do much for BP, but you could throw some garlic at it. ;)

If you actually do it, a low sodium, high potassium diet will help some.

However, the main reason for poor control is doctors using the wrong medicines or classes of medicines for age and physiology. That's another story.