Some things you should know if you take levothyroxine! Levothyroxine is a replacement hormone medication used to treat low levels of thyroid hormone, that could be caused by a pituitary condition. Levothyroxine Integrated systems approach to thyroid function.Abbreviations used: Download Scientific Diagram Levothyroxine Interactions: Drugs, Diet, & More GoodRx Thyroid nutrition for optimal thyroid health the adrenal, gut, brain and thyroid connection Levothyroxine (Synthroid, Tirosint, Levoxyl) is a medication for treating hypothyroidism (underactive thyroid), a condition that is more common in people with Down syndrome. Health care providers usually recommend taking levothyroxine with water Levothyroxine Wikipedia