Hello I previously posted about how I was feeling a bit hyper and jittery on synthroid 112 due to tsh going from . 97 to 6.2 in one year. I started 112 mcg in August and had to go back just a few days ago oct to ask about these symptoms he did say to go back on 100mcg and I am now on day 2 of doing this. I still have racing heart and jittery. How long before the dosage decrease helps me feel better?