Should I Still Be On Methimazole My Last Tsh 4.86 So Now I Have Mild Hypothyroidism?

Posted on Wed, 1 Jul 2020

Medically reviewed by Ask A Doctor - 24x7 Medical Review Team

Wed, 1 Jul 2020 Answered on

Mon, 15 Sep 2025 Last reviewed on

Question : should I still be on methimazole my last tsh 4.86 so now I have mild hypothyroidism. Will the methimazole make things worse since I went form having hperthyroidism to hypo?

Answered by Dr. Vaishalee Punj (2 hours later)

Brief Answer:
Thyroidism can deviate with methimazole

Detailed Answer:
Hello and welcome to Ask A Doctor service.

I have reviewed your query and here is my advice.

TSH of 4.86 is normal. It is not hypothyroidism or hyperthyroidism.
You should also get complete thyroid profile every time.

With methimazole, the thyroid levels can deviate. If you feeling fatigued, then it is ok to discontinue methimazole for few days and re-start when symptoms of hyperthyroidism start coming back. We can re-check thyroid profile in 3-4 weeks.

Also how are your thyroid hot nodules now? You may see your endocrinologist again for this.

Regards
Dr Vaishalee

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar