Is Blood Test Advisable After Taking Thyroid Medication?

Posted on Wed, 4 May 2016

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

Wed, 4 May 2016 Answered on

Sat, 18 Jun 2016 Last reviewed on

Question : after suddenly stopping my thyroid medicine, how how should i wait to have a blood test for a true reading? been off for a week. Was taking 200mcg

Answered by Dr. Shehzad Topiwala (1 hour later)

Brief Answer:
6 weeks

Detailed Answer:
Although I would not recommend you try this without the close and direct supervision of an endocrinologist, this is approximately the time frame it takes for one to know where the thyroid stands without taking levo thyroxine medication.

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