Hi Stacie. Did your Hashimoto's swing to Graves, or do you have both? I know there are people on a yahoogroups graves list I was on (graves_support@yahoogroups.com) who had both; I think the conventional wisdom is to treat the one with the dominant symptoms. It's great you're doing well on the PTU. Did your dr. reduce your dose? After the first few weeks, especially with such a positive reaction, most patients can have their doses reduced by as much as half., especially if you were started at a high dose, like 300. It is very common to have TSH suppression, even for as long as months into treatment, so TSH is the least important number in properly dosing Graves. Unfortunately too many endos seem not to know this and will keep patients on high doses for far too long just to bring the TSH down.
And did you have the TSI antibody test done? It's good to have a baseline early in treatment.
Take care,, Fayge (in remission for over 6 years after 14 months on methimazole)