Sympathetic nervous system instability

My mother is very weak and is now willing to try very simple health tecniques to help her very complicate medical problems.

She has kidney failure, mild, and erratic blood pressure, swinging from labile hypertension to hypotension, a history of guillain-barre syndrome that may contribute to some of these issues. Also anemia, insomnia,anxiety, weakness and tremor. Please advise. Thank you!