ATC code H03

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ATC codes
H Systemic hormonal preparations, excluding sex hormones and insulins
H01 Pituitary and hypothalamic hormones and analogues
H02 Corticosteroids for systemic use
H03 Thyroid therapy
H04 Pancreatic hormones
H05 Calcium homeostasis

ATC code H03 Thyroid therapy is a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the WHO for the classification of drugs and other medical products. Subgroup H03 is part of the anatomical group H Systemic hormonal preparations, excluding sex hormones and insulins.[1]

Codes for veterinary use (ATCvet codes) can be created by placing the letter Q in front of the human ATC code: for example, QH03.[2]

National issues of the ATC classification may include additional codes not present in this list, which follows the WHO version.

H03A Thyroid preparations[edit]

H03AA Thyroid hormones[edit]

H03AA01 Levothyroxine sodium
H03AA02 Liothyronine sodium
H03AA03 Combinations of levothyroxine and liothyronine
H03AA04 Tiratricol
H03AA05 Thyroid gland preparations

H03B Antithyroid preparations[edit]

H03BA Thiouracils[edit]

H03BA01 Methylthiouracil
H03BA02 Propylthiouracil
H03BA03 Benzylthiouracil

H03BB Sulphur-containing imidazole derivatives[edit]

H03BB01 Carbimazole
H03BB02 Thiamazole
H03BB52 Thiamazole, combinations

H03BC Perchlorates[edit]

H03BC01 Potassium perchlorate

H03BX Other antithyroid preparations[edit]

H03BX01 Diiodotyrosine
H03BX02 Dibromotyrosine

H03C Iodine therapy[edit]

H03CA Iodine therapy[edit]


  1. ^ "ATC/DDD Index 2017: code H03". WHO Collaborating Centre for Drug Statistics Methodology. 
  2. ^ "ATCvet Index 2017: code QH03". WHO Collaborating Centre for Drug Statistics Methodology.