I started taking 75 mcgs of Synthroid around June of '03. Within 6 weeks, I was hyper on that dose, and all the while my appetite got poorer and poorer. The dose was reduced to 50 mcgs; the appetite didn't return and I stayed hyper. After another 6 weeks, the Synthroid was stopped altogether, and my appetite returned. I can't say the med killed my appetite or whether the high T levels did.
One month after I quit Synthroid, I started taking 1/2 grain of Armour, gradually increasing to 2 grains today. Never since then have I had the appetite suppression, nor have I been hyper.
This little story of personal experience probably confused you as much as it does me.
I suppose what I'm trying to say is that until you get settled on one dose, almost anything might happen.