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Lack of Indomethacin Effect on Thyroid Function in Man

1977; Oxford University Press; Volume: 44; Issue: 4 Linguagem: Inglês

10.1210/jcem-44-4-748

1945-7197

Michael Croxson, THEODORE D. HALL, JOSIE E. JARAMILLO, John T. Nicoloff,

Estrogen and related hormone effects

Administration of indomethacin 200 mg daily for 2 days to four euthyroid volunteers was without significant effect on serum triiodothyronine or thyroxine and caused no consistent alteration of serum TSH. There were minor and variable changes in the pattern of thyroidal iodine release (TIR) in these euthyroid subjects. In one subject both the TIR pattern and serum TSH concentration were altered in the same direction, suggesting that these minor changes were of central origin. Indomethacin also had no effect on the stimulated pattern of TIR in one euthyroid subject receiving daily exogenous TSH injections, or in a patient with untreated hyperthyroid Graves' disease. Prostaglandin A1 infusion in one subject did not alter serum TSH or thyroidal iodine release. It is concluded that prostaglandins probably have no obligatory physiological role in modulating TSH or thyroid hormone secretion in man.