Hypothyroidism is a sign, defined as low thyroid hormones, most commonly caused by Hashimoto's thyroiditis in the UK and iodine deficiency worldwide
Presentation: cold intolerance, weight gain, lethargy
Diagnosis: low T3
Management: usually PO levothyroxine after considering underlying cause
Hashimotos
Iodine deficiency
Thyroiditis
Medications
Amiodarone
Calcium salts- reduce absorption of levothyroxine
Written in 2025