H03A Thyroid preparations H03AA Thyroid hormones H03AA01 Levothyroxine sodium H03AA02 Liothyronine sodium H03AA03 Combinations of levothyroxine and liothyronine H03AA04 Tiratricol H03AA05 Thyroid gland preparations H03AA51 Levothyroxine sodium and iodine compounds H03B Antithyroid preparations H03BA Thiouracils H03BA01 Methylthiouracil H03BA02 Propylthiouracil H03BA03 Benzylthiouracil H03BB Sulphur-containing imidazole derivatives H03BB01 Carbimazole H03BB02 Thiamazole H03BB52 Thiamazole, combinations H03BC Perchlorates H03BC01 Potassium perchlorate H03BX Other antithyroid preparations H03BX01 Diiodotyrosine H03BX02 Dibromotyrosine H03C Iodine therapy H03CA Iodine therapy References H03