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On treatment with SYNTHYROID for HYPOTHYROIDISM in pregnancy. Risk?

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Hello. I am a 33yr old South Asian (Indian) woman who has hypothyroidism. I recently found out I was pregnant. I am 4.5 weeks pregnant. I got my blood results back today and my TSH was 6.6. I am very worried as I know this is high and that baby development is very crucial to thyroid function. I take 75 mcg of Synthroid, and my doctor suggested I switch to 100 mcg. I am worried that there has already been damage done to the baby. Should I be concerned? Once I take the new dose, how soon after should I get tested again? I take my Synthroid first thing in the morning, and then my pre-natal vitamin 4 hours after. Is that enough of a gap? Thank you.

Category: Endocrinologist

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Category: Diabetologist
 26 Doctors Online

Thank you for your query at
Please do not worry. No such damages have been done to the baby. You have rightly increased the dose to 100mcg. Now check every month through pregnancy and target TSH is 0.4-2.5. Dose needs to be adjusted accordingly.
Feel free to discuss further,

Patient replied :

Thank you very much. One quick question - how long after I take my thyroid medicine can I take my pre-natal vitamin? They say at least 4 hours, but should I wait longer? Any diet or natural remedy I can also use to help my thyroid function in addition to increased dosage? Thank you again I feel much better.

You can take vitamin prelunch and thyroxine early morning.

Dr. J Muthukrishnan
Category: Diabetologist
1. 10th Asia-Pacific Pediatric Endocrine Society  Fellows meeting, Seoul, Korea, Oct 2008
2. Eighth ICMR Course on Genetics and Genetic Counseling – Jul 2008 – SGPGI, Lucknow
3. Annual Certificate Course on Endocrinological Laboratory Techniques at National Institute of Nutrition (ICMR) Hyderabad,India, ( Aug-Sep 2006) 
Fellowship: Endocrinology, Diplomate of National Board, National Academy of Medical Sciences, New Delhi, 2008, Medwin Hospital, Hyderabad
Senior Residency: Diplomate of National Board (General Medicine), National Academy of Medical Sciences, New Delhi, 2002
Residency: MD, General Medicine, 1997-2000, Armed Forces Medical College, 2nd position in University
Medical School: MBBS, Armed Forces Medical College, 1992
Dr. J Muthukrishnan and 4 other Medical Specialists are ready to help you

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