It's a relatively new brand of levo that was just put on the market in 2009. It's a gelcap and its only ingredients
, besides the levo, are water, glycerin, so there's no fillers/binders to react to, making it virtually hypoallergenic. Tirosint is also absorbed much better than pill type medications, so you probably want to start on the lowest possible dose (13.5 mcg); since it's a gel cap, it can't be split like a pill.
You might also ask your doctor to look into adrenal issues.