Hello and welcome! There is a significant risk that hyperthyroidism will recur if antibody levels are elevated, even if TSH, T3, and T4 are normal.
If you and your doc have agreed on discontinuing the meds, just make sure you have regular followups scheduled to see if your levels are creeping hyper again. Also, pay attention to your body, and if you feel those old hyper symptoms coming back, definitely call the office to get in for labs ASAP!
I took methimazole for 7 years and weaned off reeeeeaaallllly slowly. By the last year or so, I was taking just the *tiniest* crumb of meds (1/4 of a 5 mg tab) twice a week!
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