Thyroid Hormones

Liothyronine

Products Liothyronine (T3) is commercially available in many countries in tablet form in combination with levothyroxine (T4) (Novothyral). In other countries, monopreparations without levothyroxine are also available. Structure and properties Liothyronine (C15H12I3NO4, Mr = 650.977 g/mol) is present in drugs as liothyronine sodium, a white to pale colored, hygroscopic powder that is practically insoluble in … Liothyronine

Levothyroxine

Products Levothyroxine is commercially available in tablet and capsule form (Eltroxin, Euthyrox, Tirosint). It is also combined fixed with the thyroid hormone liothyronine (T3) (Novothyral). In 2018, an additional solution in monodoses was registered (Tirosint Solution). Bioequivalence is not always given between different preparations. Therefore, switching should be done only under medical supervision. Structure and … Levothyroxine