Posted 7/16/2013 8:27 AM (GMT -6)
Your course sounds pretty much like mine was. Scary hyperthyroidism treated with RAI, followed by a gradual descent (medication-aided) into hypothyroidism. Since the RAI pretty much destroys your thyroid, this is the expected course.
My endocrinologist started me on a very low dose of synthroid as soon as my levels fell on the hypothyroid side. It was a slow course of increasing the meds just a bit, testing then waiting. As I recall, my synthroid was increased a bit about every three months until I stayed in the euthyroid range, then my follow-ups were stretched to every six months. I've been stable on 200 mcg. now for over ten years.