take levothyroxine FIRST THING in the morning on an empty stomach
December 2008
It's important to take levothyroxine FIRST THING in the morning on an empty stomach...because absorption can be decreased by calcium, iron, fiber, and other substances.
New evidence suggests that even coffee MIGHT reduce absorption.
Tell patients to wait at least 30 mins before eating...and 4 hrs before taking supplements with calcium, iron, magnesium, or aluminum. The same 4-hour wait goes for sucralfate, cholestyramine, and orlistat.
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