Hi. I don't know much about your history but I saw in Barbara's post that you have MG and POTS. I was wondering if you knew that they are now looking at renin/aldosterone/angiotensin as an integral part of POTS. Have you been to an endocrinologist to check this out? Google POTS and aldosterone and you'll get some info. Sometimes it can be hard to identify these endocrine problems, so try to find a very good endocrinologist.

Annie