You MUST taper down on T3
Try 6 wk cycle
Start at 25mcg (not mg)
Every 4th Day increase 25 mcg untill you get to 100 mcg (Keeping complete cycle to 6 wks strongly recommended includes the taper up and down)
On taper down use same time intervals of dose change every fourth day--also much easier on the thyroid if taper is 75mcg, 50mcg, 37mcg, 25mcg, 13mcg--------stay away for at least a few months.
Although have not come accross any studies indicating harm to thyroid I can site--you want to avaoid shocking it. Please disregard the post that no taper down is required. Also, do your own research as this is not a substance to jump in to without a solid foundation of research.