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Thyroid monitoring after dose change — GPhC CRA MCQ

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EasyEndocrine TherapeuticsThyroid monitoring after dose changeGPhC CRA

A GP increases levothyroxine from 75 micrograms to 100 micrograms daily in a patient whose TSH remains raised. The patient asks when the dose effect should be checked. What monitoring is required?

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Correct answer: D — TSH after about 6 to 8 weeks

Thyroid function tests take several weeks to reflect a levothyroxine dose change. TSH is commonly rechecked after about 6 to 8 weeks when titrating therapy. Testing the next day would not provide a meaningful assessment of the dose change.

Reference: BNF; NICE CKS