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Related Experiment Videos

Thyroid abnormalities during lithium treatment.

A Bocchetta1, F Bernardi, M Pedditzi

  • 1Department of Neurosciences B.B. Brodie, University of Cagliari, Italy.

Acta Psychiatrica Scandinavica
|March 1, 1991
PubMed
Summary
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Lithium treatment can cause thyroid issues like goitre and subclinical hypothyroidism, especially in women and older patients. Combining lithium with carbamazepine further impacts thyroid hormone levels.

Area of Science:

  • Endocrinology
  • Pharmacology
  • Clinical Medicine

Background:

  • Lithium is a widely used mood stabilizer for bipolar disorder.
  • Thyroid dysfunction is a known potential side effect of lithium therapy.
  • Long-term effects of lithium on thyroid function require ongoing investigation.

Purpose of the Study:

  • To evaluate thyroid function in Sardinian outpatients undergoing lithium treatment.
  • To assess the prevalence of goitre, hypothyroidism, and antithyroid antibodies.
  • To investigate the influence of treatment duration, age, sex, and co-administered drugs on thyroid function.

Main Methods:

  • Cross-sectional study of 150 Sardinian outpatients on lithium.
  • Clinical examination for goitre.

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  • Laboratory tests for thyroid hormones and antithyroid antibodies.
  • Analysis of correlations with treatment duration, age, sex, and concomitant medications like carbamazepine.

    • Main Results:

    • Goitre observed in 51% of patients, unrelated to treatment duration.
    • Subclinical hypothyroidism found in 19% of patients.
    • Antithyroid antibodies positively correlated with age and lithium duration, higher in women.
    • 53% of antibody-positive patients had subclinical hypothyroidism.
    • Combination of lithium and carbamazepine lowered total T4 and T3 levels.

    Conclusions:

    • Lithium treatment is associated with a high prevalence of thyroid abnormalities, including goitre and subclinical hypothyroidism.
    • Antithyroid antibodies are common in lithium-treated patients and linked to demographic factors and treatment duration.
    • Concomitant carbamazepine use exacerbates lithium's impact on thyroid hormone levels.