Hi Elaine -

I hope you are enjoying your summer. I'm following up with my most recent lab results including TSI.

Am I in remission? Or perhaps it was postpartum thyroiditis all along? Should I be concerned that my FT4 hasn't moved much? Can I stop taking Methimazole?

Thanks as always for your help to this community.

3/30/2023:
TSH: 0.229 L mIU/L (0.270 - 4.200 mIU/L)
Free T4: 0.9 ng/dL (0.9 - 1.7 ng/dL)
Free T3: 1.7 L pg/mL (2.3 - 4.1 pg/mL)

*3/30/2023 reduced to 5 mg of Methimazole / day

5/10/2023:
TSH: 11.200 H mIU/L (0.270 - 4.200 mIU/L)
Free T4: 0.8 L ng/dL (0.9 - 1.7 ng/dL)
Free T3: 2.5 pg/mL (2.3 - 4.1 pg/mL)

* 5/10/2023 took 10 days off Methimazole then reduced Methimazole to 1.25 mg / day

6/5/2023:
TSH: 5.26 H mIU/L (0.270 - 4.200 mIU/L)
Free T4: 0.9 ng/dL (0.9 - 1.7 ng/dL)
Free T3: 2.7 pg/mL (2.3 - 4.1 pg/mL)

6/23/2023:
TSH: 4.37 mIU/L (0.270 - 4.200 mIU/L)
Free T4: 1.0 ng/dL (0.9 - 1.7 ng/dL)
Free T3: 2.7 pg/mL (2.3 - 4.1 pg/mL)

* 6/23/2023 reduced to 1.25 mg of Methimazole every other day

* 7/18/2023 reduced to 1.25 mg of Methimazole every three days

8/14/2023:
TSH: 1.59 mIU/L (0.270 - 4.200 mIU/L)
Free T4: 1.0 ng/dL (0.9 - 1.7 ng/dL)
Free T3: 2.5 pg/mL (2.3 - 4.1 pg/mL)

TSI
Normal range: below <0.55 IU/L
2/28/23: 3.33IU/L High
8/14/23: 0.42IU/L

Hi,
Your lab results indicate that you are in remission. Since you've already been weaning down to a negligible dose you should be able to stop meds although you'll need labs every 6 months or sooner if labs change. Congratulations.
Best, Elaine