26th February 2024

A 33-year-old woman presents to the general practitioner with cold intolerance, constipation and weight gain.

A 33-year-old woman presents to the general practitioner with cold intolerance, constipation and weight gain. A blood test is performed which shows fT4 2ug/dL and TSH 7ug/dL. A diagnosis of hypothyroidism is made and the patient is started on levothyroxine tablets.

Select one option which correctly describes an element of the monitoring required when starting thyroid hormone replacement.