A sixty-year-old woman has been taking levothyroxine daily f…
A sixty-year-old woman has been taking levothyroxine daily for primary hypothyroidism for one year. She reports taking the pill each morning when she gets up, along with calcium and iron supplements. Recent laboratory tests show that her thyroid-stimulating hormone is still mildly elevated. What teaching should you provide to improve the effectiveness of her thyroid hormone replacement?