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A prospective study of the effects of lithium on thyroid function and on the prevalence of antithyroid antibodies

  • D. H. Myers (a1), R. A. Carter (a1), B. H. Burns (a1), A. Armond (a1), S. B. Hussain (a1) and Vinnie K. Chengapa (a1)...

Tests of thyroid function and pathology were carried out on 133 patients before they were treated with lithium (Li+). Of the 12 patients who subsequently became hypothyroid during treatment with lithium 9 had, before the commencement of treatment, thyroid autoantibodies and/or an exaggerated thyroid stimulating hormone (TSH) response to thyrotropin releasing hormone (TRH), whereas 3 patients had neither of these indicators. Lithium administration was accompanied by a rise in thyroid antibody titre in 20 patients but a fall in only 5, a statistically significant difference. Evidence that it may be an immunostimulant is discussed. Li+-induced thyroid failure cannot be accurately predicted, and may occur suddenly. The best minimum safeguard, therefore, is serial thyroxine (T4) (or free T4) estimation, supplemented if equivocal by a free thyroxine index (FTI), a basal TSH and, if doubt remains, by a TRH test.

Corresponding author
1 Address for correspondence: Dr D. H. Myers, Royal Shrewsbury Hospital, Shelton, Shrewsbury SY3 8DN.
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Psychological Medicine
  • ISSN: 0033-2917
  • EISSN: 1469-8978
  • URL: /core/journals/psychological-medicine
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