Some dietary changes can change the way your body absorbs the thyroid
medicine. Talk with your doctor if you are eating a lot of soy products or are on a high-fiber diet.Do NOT take thyroid hormone with fiber supplements, calcium, iron, multivitamins, aluminum hydroxide antacids, colestipol
, or medicines that bind bile acids. If you have just started medication, check your hormone levels every 2 - 3 months. After that, your thyroid hormone levels should be monitored at least every year.