Hi Amy. I have had Hashimoto’s for ages, and for a while there I was hyperthyroid. I had both anti-TPO and anti-thyroid antibodies. When I was given methimazole/Tapazole to counter the hyperthyroidism, I rapidly became hypothyroid. My endocrinologist couldn’t believe how fast the medication made me hypo. So be aware that that could happen, and speak up if it does.
If I had to choose, I prefer being hypo to being hyper. While you are hyper, you might want to avoid iodized salt and if you can, eat plenty of broccoli, cauliflower, and soybeans (all goitrogenic foods).
My endo (not the one who prescribed methimazole) said that he thought my thyroid has probably burned itself out. I did well on Synthroid for a few years but eventually my free T3 was always below the normal range, and I felt hypo, so although I was skeptical about the possibility of it helping, I asked to try Armour thyroid. Armour works well for me, but a while after being on immunosuppressants for MG, I became hyper. We decreased my Armour by half, and I have been fine for the past two years. I am changing over to NP thyroid soon because it is less expensive than Armour. Insurance doesn’t pay for natural thyroid.