Why does increasing my prednisone clear up bad dysautonmia spell of brain fog, near syncope when nothing else does (ie salt, h20, florinef). i have ctd.

Immune modulation: If your ctd refers to "connective tissue disorder", then your body produces antibodies against your own tissues. Dysautonomia is one possible manifestation of auto-antibodies attacking your autonomic nerves. In that case, Prednisone would suppress the connective tissue disorder's autoimmune attack against your autonomic nerves.