Related Experiment Video
Updated: Jun 8, 2026

05:42
The Forced Swim Test as a Model of Depressive-like Behavior
Published on: March 2, 2015
Reversible escitalopram-induced hypothyroidism
Salih Saygin Eker1, Cengiz Akkaya, Canan Ersoy
1Department of Psychiatry, Uludag University Medical Faculty, 16059 Bursa, Turkey. saygineker@yahoo.com
General Hospital Psychiatry
|September 21, 2010
Summary
Selective serotonin reuptake inhibitors (SSRIs) can rarely cause hypothyroidism. This case highlights escitalopram
Area of Science:
- Endocrinology
- Pharmacology
- Neuroscience
Background:
- The hypothalamic-pituitary-thyroid (HPT) axis is linked to depression.
- Selective serotonin reuptake inhibitors (SSRIs) can affect thyroid indices.
- Hypothyroidism is a rare SSRI-associated adverse effect.
Observation:
- A case study investigated the effects of escitalopram on thyroid function.
- The patient exhibited no clinical signs of thyroid dysfunction.
Findings:
- Escitalopram use was associated with the development of hypothyroidism.
- The induced hypothyroidism was asymptomatic, lacking typical clinical signs or symptoms.
Implications:
- Clinicians should consider SSRI-induced asymptomatic hypothyroidism.
- Monitoring thyroid function may be necessary during SSRI treatment.
- This finding expands understanding of SSRI adverse effects on the HPT axis.
Related Concept Videos
Hyperthyroidism I: Introduction
Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...
Graves' Disease I: Introduction
Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence in...
Hyperthyroidism II: Pathophysiology
Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
Graves Disease II: Pathophysiology
Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...
Hypothyroidism II: Pathophysiology
Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
Antidepressant Drugs: Tricyclics, SSRIs, and SNRIs
Tricyclic Antidepressants (TCAs), including Desipramine (Norpramin), Imipramine (Tofranil), Clomipramine (Anafranil), and Amitriptyline (Elavil), inhibit serotonin and norepinephrine reuptake and also block other receptors. They are used for depression, pain conditions, and insomnia. Common adverse effects include anticholinergic effects, sedation, orthostatic hypotension, and weight gain. They have a narrow therapeutic window and so require plasma-level monitoring. Abrupt discontinuation can...