I have had Hashimoto's for years and seem to be having a sudden sensitivity/intolerance to Synthroid
. This developed since my hyperthyroid bout last spring and swing back to hypothyroidism. Every time I increase my dose, I experience horrible hyper symptoms including sleep difficulties, heart palpitations and tearfulness. However, the dilemma is that if I don't increase the dose, the hypothyroid symptoms persist. My TSH is slightly below 3 and the target is 1.