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A member asked:
Why does levothroid need to be taken at least 4 hr before any calcium or antacid? i have taken it for years but the instructions changed a year or so ago to the time limit for calcium but the most recent instructions now include the antacid. why the chan
A doctor has provided 1 answer
Calcium : Calcium or antacids can bind various medications, making them less available for absorption, thus reducing their efficiency. That is the reason for the change in labelling instructions.
Answered 10/3/2016
5.3k views
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