<prompt> Liothyronine is the drug of choice in treatment of:Myxedema coma.CretinismIodine deficiency Goiter.Non resectable causes of papillary thyroid carcinoma.  <response>: 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. 