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Effect of lithium therapy on thyroid function: a retrospective study on Indian patients
A S Srivastava1, P B Behere, J K Agrawal
1A.S. Srivastava, MD, Lecturer, Department of Psychiatry, Institute of Medical Sciences, Banaras Hindu University, Varanasi.
Indian Journal of Psychiatry
|July 12, 2011
Summary
Lithium therapy for bipolar disorder can affect thyroid function. This study found elevated TSH and decreased T4 levels in some patients, highlighting the need for thyroid monitoring during treatment.
Area of Science:
- Endocrinology
- Psychiatry
- Pharmacology
Background:
- Lithium is a first-line treatment for bipolar disorder.
- Long-term lithium use is associated with various side effects.
- Thyroid dysfunction is a known potential adverse effect of lithium therapy.
Purpose of the Study:
- To investigate the prevalence of thyroid function alterations in patients with bipolar disorder undergoing lithium therapy.
- To assess the impact of lithium treatment duration on thyroid function parameters.
Main Methods:
- Study included thirty patients with bipolar affective disorder on lithium therapy for 6 to 24 months.
- Thyroid function tests were performed, measuring serum TSH, T3, and T4 levels.
- Results were compared against established normal ranges.
Main Results:
- Eight patients (26.67%) exhibited elevated serum TSH levels.
- Four patients (13.33%) showed decreased serum T4 levels.
- Serum T3 levels demonstrated a declining trend but remained within normal limits for all participants.
Conclusions:
- Lithium therapy in bipolar disorder patients is associated with a significant incidence of subclinical hypothyroidism (elevated TSH) and potential hypothyroidism (decreased T4).
- Regular thyroid function monitoring is crucial for patients on long-term lithium treatment.
- Further research may explore the mechanisms and clinical significance of these thyroid function changes.
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