For low Sodium, I was advised to take an Adrenal supplement. I also take a little salt. It works for me. Magnesium is needed to metabolize Potassium. Are you taking Magnesium? Yes, I had HTMA's done for sodium and potassium levels. I did not have low Sodium, but I had low Potassium and low Magnesium. Supplementing with Magnesium can lower Sodium and that is what happened to me. So I keep it in check now with a BP machine.. The symptoms, too, tell me something is out of balance..