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A member asked:
Can synthroid (thyroxine) cause cardiac disturbances?
A doctor has provided 1 answer
When overused: Yes. Taken in excess (or, much less commonly at a dose that's just too high for you) synthroid (thyroxine) can cause abnormal rhythms, particularly in the top chamber. These can manifest as palpitations, rapid heart rate, or even near-fainting symptoms. Lab tests can evaluate whether you have too much synthroid (thyroxine).
Answered 6/6/2013
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