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A member asked:
I would like to know why manufacturer's use levothyroxine rather than thyroxine in their thyroid medications? levo has heavier sodium molecule
A doctor has provided 1 answer
Thyroxine: 22M asks about diff between levothyroxine and thyroxine and notes Levo has heavier Na molecule. ANS: my recollection is that most Na is not of the heavy type. Recommend you look at the chemistry of Na at wikipedia for more details about heavy Na.
Answered 6/8/2020
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