Get your Health question answered in 3 easy steps
A Doctor will be with you shortly
Ask a Doctor Now
149 Doctors are Online

On Synthroid. Blood test showed T4 value 1.3 and TSH 0.005. Having weight gained. Dosage?

User rating for this question
Very Good
Answered by

Practicing since : 2001
Answered : 1482 Questions
I have been on synthroid for 7 months now, just had a blood test and my free T4 value is 1.3 and TSH is <0.005 my Dr says I'm at an appropriate levels after having my thyroid removed. my dose is 150mg but still tierd can't loose weight, exercise daily, can barley run 6 miles (that used to be a short run), tierd, still not myself. I was hoping to have my dose increased or am I where I should be after 7 months
Posted Tue, 12 Nov 2013 in Thyroid Problem and Hormonal Problems
Answered by Dr. Shehzad Topiwala 21 minutes later
Brief Answer:
Seems fair

Detailed Answer:
For 'differentiated' thyroid cancers, the protocol is to suppress the TSH to below 0.1 and keep the free T4 at the high normal range. Your labs appear to be compatible with this goal. This needs to be done for 5 years after the cancer is removed at which point one is presumed cured of the cancer, provided the cancer markers in the blood are undetectable along with an Ultrasound of the neck showing no remaining thyroid tissue. Sometimes 'Whole body scans' are performed to ensure cure.
With this type of intentional 'over-dosing' of the thyroid there can be problems like worsening of osteoporosis or angina or irregular heart rhythms. Hence, an endocrinologist is best trained to manage all these situations.

It would be unreasonable and unsafe to give you a higher thyroid dose at this point.
Above answer was peer-reviewed by
Share on Facebook
Share on Twitter
Share on Google+
Question is related to
Diseases and Conditions
Medical Topics

The user accepted the expert's answer

Ask an Endocrinologist

© Ebix, Inc. All Rights Reserved.
All the information, content and live chat provided on the site is intended to be for informational purposes only, and not a substitute for professional or medical advice. You should always speak with your doctor before you follow anything that you read on this website. Any health question asked on this site will be visible to the people who browse this site. Hence, the user assumes the responsibility not to divulge any personally identifiable information in the question. Use of this site is subject to our Terms & Conditions
Already Rated.
Your rating:

Ask a Doctor