Levothyroxine with iron or calcium
Levothyroxine, Iron, and Calcium Timing
Why levothyroxine is often separated from iron and calcium, what the official label says, and how to build a schedule around your actual medicines.
The levothyroxine label says to take it on an empty stomach before breakfast and to separate it by at least four hours from drugs known to interfere with absorption. The correct schedule still depends on the exact products and your prescriber’s instructions.
What to consider
The four-hour spacing rule is about absorption, not a universal instruction to change your dose.
Bring the exact product names, strengths, formulations, and usual times to a pharmacist or clinician.
A schedule should account for all medicines and supplements, meals, coffee, and adherence, not just one pair of products.
The safest next question is about you.
SymptomSolver can compare the medicines you actually use with your allergies, conditions, labs, recent changes, and previous conversations. It still does not replace your prescriber or pharmacist.
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