Endocrine Abstracts

Several preparations of thyroxine are available nowadays but is a great challenge for every clinician when the oral and intramuscular administration is failing and has to consider long term intravenous administration. This is a 42 years old lady who had a total thyroidectomy for Graves thyrotoxicosis. She commenced on multiple oral preparations of thyroxine and liothyroxine with no biochemical response. This is not a case of pseudomalabsorption as oral absorption studies of hi...