I was started on T+T in july 2014, then, after failure, on IVIG in Oct 2014, and have not had an attack since. Nevertheless, I had frequent palpitations, heat and cold intolerance, and exercise intolerance. My BP was very labile to 180/115 from 130/75. After a year of an A2 antagonist I was changed to a B blocker, and now feel FANTASTIC. I still get fortnightly IVIG. Is this a common experience?