Low thyroid hormone levels can occur naturally or when the thyroid gland is injured by radiation/medications or removed by. Thyroids meds not working? These 6 common medication mistakes can really mess with your thyroid medication. Find patient medical information for Synthroid Oral on WebMD including its uses, This medication is also used to treat other types of thyroid disorders (such as. Availability Prescription only. Elliot Levy. Some endocrinologists recommend that people whose hypothyroidism symptoms persist despite normal TSH levels try adding synthetic triiodothyronine T3 to their levothyroxine therapy. Related Drugs. See also: Synthroid drug interactions in more detail. Foods containing soy and cottonseed meal can make Synthroid less effective. Tablets shown not actual size and may not represent exact color. Keep this drug in cool, dry, dark place, like in a cabinet or on a shelf in a closet away from high-humidity environments like your bathroom. Related Drugs. Healthcare Professionals. Whether due to genetic changes, stress, or nutritional deficiencies, these patients fail to effectively convert enough Medicationn into T3. Elisa shares her journey, from getting diagnosed to starting—and continuing—treatment with Synthroid, and living with hypothyroidism. However, you may not be able to take Synthroid if you have certain medical conditions. Synthroid should not be used to treat obesity or weight problems. Hear from Elisa as she talks about the importance of taking Synthroid the right way, every day.