Is nicotine replacement (e-cigs) ok to keep from smoking with graves' disease? being treated w/ 10mg methimazole daily.

Slightly better: But neither is really good for you.

Nicotine and Graves': Nicotine in any form increases your risk of developing graves orbitopathy, which can cause (in increasing severity), dryness, redness, swollen eyelids, eyelid retraction, double vision, proptosis (bulging eyes), and loss of vision. This result from autoimmune cross reaction between some thyroid cells and cells in the orbit.