Thyroid Medications Levothyroxine and Food and Vitamin Interactions

Take levothyroxine once a day in the morning on an empty stomach, at least one-half hour to one hour before eating any food.

People who take thyroid medication should be advised that calcium supplements and certain foods such as soybean flour, soy, grapefruit juice, espresso, coffee, millet, cottonseed meal, walnuts, and a sudden change to a high-fiber diet may interfere with absorption of levothyroxine from the gastrointestinal tract.

You should separate the administration of levothyroxine and multivitamin with minerals by at least 4 hours.


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