Look up adrenal cortical hyperfunction. You might find something to take to your doctor. Look at how epinephrine and norepinephrine are supposed to function. These important functions can be disrupted by a brain injury. Norepinephrine can cause an increase in blood pressure.

There is a class of drugs called SNRI's. Selective Norepinephrine Reuptake Inhibitors. I don't know if they help with this kind of problem but it shows that they can manipulate norepinephrine.

Adrenal Cortical Hyperfunction can cause emotional outbursts (lability) and other stress reactions. I believe it is the cause of my 195/155 BP during stress situations that overwhelm me. These are usually brought on by too much auditory and/or visual stimulation.

I have propanolol (a beta blocker) in the cabinet as a back-up in case I have a difficulty getting my body to relax and recover.