If you are taking any antidepressant, make sure you discuss the implications with your doctor, and be sure to have periodical blood tests to determine your thyroid function while taking these drugs. See the actual article . Calcium supplements are also important for those dealing witht thyroid cancer, as suppressive doses of thyroid hormone can in some cases lead to ostepoporosis. A doctor from Johns Hopkins published a letter in JAMA reporting that several patients taking levothyroxine experienced an increase in TSH levels after they started to take calcium supplements. When they change their pattern and began to take the calcium and thyroid hormone at least four hours apart, TSH returned to the initial level.
Many doctors recommend at least two hours between taking iron and the thyroid hormone.
Keep in mind that calcium tablets are better absorved with meals, and that the optimal way to take your thyroid hormone to ensure maximuim absorption is at least an hour before breakfast, or two hours after eating any meal. Figure out the best schedule for taking thyroid hormone, vitamins and supplements, and stick to it regularly. And if you add calcium supplements or iron to your diet while you're already on thyroid hormone, you probably ought to have your blood levels rechecked after a few weeks to make sure they haven't changed your TSH levels. See the actual article . If you developed allergic symptoms after taking your thyroid hormone, you may be one of the small number of people who are allergic to the ingredients in synthetic thyroid hormone preparations.