What Causes Sudden Weight Loss While On Thyronorm?

Posted on Fri, 24 Jun 2016

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

Fri, 24 Jun 2016 Answered on

Fri, 15 Jul 2016 Last reviewed on

Question : Hi I am 49 years old, weighing around 70 kegs. My height is 5'3". I have been diagnosed with hypothyroi dism- high TSH levels around eight months back. I started on Thyronorm 25 mg. I wasn't owing any weight. I used to gym regularly. Now I have since the last one month switched to yoga and swimming. I am noticing my weight has gone down by a kilo. Is this due to medication or change in exercise form. Please advise.

Answered by Dr. Suresh Heijebu (8 hours later)

Brief Answer:
Weight loss is directly related to medication effect

Detailed Answer:
Hello, Madam.

I can certainly understand your concern.

I have worked through your query in detail.

The weight loss which you experienced is directly(mainly) related to effect of Thyronorm 25mcg although exercise may contribute.

Thyroxine is known to increase the basal metabolic rate and cause weight loss in hypothyroidism.

Post your further queries if any.
Thank you.

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