Liothyronine is the drug of choice in treatment of:
Myxoedema coma is an emergency condition; hence faster acting T3 (Liothyronine) is preferred over thyroxine (T4). For the other indications thyroxine is preferred because of longer duration of action.
Myxedema coma.
Cretinism
Iodine deficiency Goiter.
Non resectable causes of papillary thyroid carcinoma.