title: I take Synthroid for my underactive thyroid. What should I do if it is discontinued?
mesh_terms: D004355:Drug Stability; D004335:Drug and Narcotic Control; D006801:Humans; D007037:Hypothyroidism / Q000188:drug therapy*; D013974:Thyroxine / Q000737:chemistry / Q000627:therapeutic use*
chemical_list: D013974:Thyroxine