I've been talking Levo since 1974. Had dose adjusted at Times. Was on 200mcg. Then pc put it down 7 months ago to 175mcg. I've been feeling very jittery and dizzy and have loud noise in head. Also a racing heart. Just had to go to e.r because of it. E.R said my TSH was too low at 0.05. Told me he would suggest to my pc to put me down on dose to 125mcg. Now, can I stop my old 175mcg to get down to125mcg faster?? Can't deal with being this hyperness much longer!! Must I get on the125mcg right away??