You can do a trial of transdermal magnesium chloride, every other day, for
optimizing your circulation, you may try Nitric Oxide supplements or Arginine powder.
Do you know exactly why you're on Metoproplol?
Have you ruled out nutritional deficiencies, like Co- Q10, Methylocobalamin B12, Vitamin D, etc.?
Do you know your heart rate increase within 10 minutes of assuming an upright position?
That's a key symptom in POTS and the baseline number is