Delayed intestinal absorption of levothyroxine.

  title={Delayed intestinal absorption of levothyroxine.},
  author={Salvatore Benvenga and Luigi Bartolone and Stefano Squadrito and Francesco Lo Giudice and Francesco Trimarchi},
  journal={Thyroid : official journal of the American Thyroid Association},
  volume={5 4},
We report four female patients with nodular goiter (in two of the four due to Hashimoto's thyroiditis) and one male patient with frank hypothyroidism due to Hashimoto's thyroiditis in whom TSH-suppressive or replacement L-T4 therapy failed to suppress or, respectively, normalize serum TSH. As is typical in our country, our patients took L-T4 15-20 min before a light breakfast. Gastrointestinal or other diseases and drugs known to interfere with the intestinal absorption of L-T4 were not the… CONTINUE READING

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