Approach to a low TSH level: Patience is a virtue.
Cleve Clin J Med. 2010 Nov;77(11):803-11
Authors: Pantalone KM, Nasr C
Confronted with a low serum level of thyrotropin (thyroid-stimulating hormone, TSH), physicians should not jump to the conclusion that it is due to a hyperthyroid state, as other conditions and some drugs can be associated with a TSH level that is slightly low (0.1-0.4 ?IU/mL) or frankly suppressed (< 0.1 ?IU/mL). This review discusses how to approach a low TSH, stressing the frequent need to reassess thyroid function before making a diagnosis, the underlying processes and the drugs that can be responsible, and the degree of TSH suppression and its role in the evaluation.
PMID: 21048053 [PubMed - in process]