Thank you so much, Psalm 23. I apologize for the delay, but the IVIG made me so sick and so tired that I am just now getting my energy level back and able to do things. But, for about a month afterwards, I didn't even have the energy to do everyday life and the pain, OMG the pain! However, though, I didn't notice at the time, but I do think it significantly helped with all my heart issues. Because, they are now coming back and I didn't even realize I hadn't had any problems until they returned. I was so focused on my pain and fatigue, I didn't notice other differences. I still don't know if it's worth going through again. That head pain I had for over a week was pretty intense. We will see. I am glad it's helping you. I too am using it for Autoimmune Autonomic Neuropathy. Blessings!