skip to main content

Levothyroxine monitoring — GPhC CRA MCQ

Instant feedback + full explanation. One question, done properly.

EasyEndocrine TherapeuticsLevothyroxine monitoringGPhC CRA

A 56-year-old woman taking levothyroxine asks why her GP repeats thyroid function tests after dose changes. She has no symptoms and takes the medicine consistently. What monitoring is required?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: B — Check TSH after an appropriate interval following a dose change

Levothyroxine dosing is monitored mainly using TSH, with timing after dose changes allowing a new steady state. Symptoms, adherence and interacting medicines should also be considered. Checking too early can lead to inappropriate dose changes.

Reference: BNF; NICE CKS