Levothyroxine should be taken when?

• A. In the morning on an empty stomach
• B. In the evening with meals
• C. After antacids
• D. With calcium supplement

Answer: (A)

Levothyroxine absorption is best when the stomach is empty, because food and mineral-containing products can bind the medication and markedly reduce how much gets into the bloodstream. This is why the most effective and consistent way to take it is first thing in the morning before breakfast, with a full glass of water, ideally 30 to 60 minutes before eating. When taken with meals, or after antacids, or alongside calcium or iron supplements, absorption can drop significantly, leading to insufficient thyroid hormone levels and symptoms of hypothyroidism. If mornings are really difficult, some clinicians consider a bedtime dose with a similar separation from the previous meals or supplements, but morning on an empty stomach remains the preferred approach to maintain steady levels.