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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes The Lowering Of TSH Levels While On Levothyroxine And Have Graves S Disease?

Hi, Dr. Manoranjan. I have graves disease and the last few months my tns levels have been low. In February my levels were 016.08 and I just had labs drawn on Friday and today my results were 0.6.38. I dont understand since im taking mt meds daily (levothytoxin) 100mcg.
Thu, 18 Aug 2016
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Endocrinologist 's  Response
if you are taking levothyroxine ,it means you have hypothyroidism.
Low level of TSH means the dose is high so you can decrease the dose to 75mcg and repeat investigations after 6 weeks.
Note: Graves causes hyperthyroidism (overactivity) but if you are treated you may develop hypothyroidism which needs levothyroxine replacement.
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What Causes The Lowering Of TSH Levels While On Levothyroxine And Have Graves S Disease?

if you are taking levothyroxine ,it means you have hypothyroidism. Low level of TSH means the dose is high so you can decrease the dose to 75mcg and repeat investigations after 6 weeks. Note: Graves causes hyperthyroidism (overactivity) but if you are treated you may develop hypothyroidism which needs levothyroxine replacement.