A 30-year-old woman with hypothyroidism controlled on levothyroxine 100 mcg daily presents to the GP at 6 weeks of gestation. Her most recent TSH was ...

Question

A 30-year-old woman with hypothyroidism controlled on levothyroxine 100 mcg daily presents to the GP at 6 weeks of gestation. Her most recent TSH was 2.1 mIU/L (pre-pregnancy). Which is the single most appropriate action regarding her levothyroxine?

Accepted Answer

Increase the dose by approximately 25-50% as soon as pregnancy is confirmed and check TSH every 4-6 weeks

Answer

Continue the same dose and recheck TSH at 28 weeks

Answer

Stop levothyroxine as it is unsafe in pregnancy

Answer

Halve the dose to reduce the risk of fetal hyperthyroidism

Answer

Switch to carbimazole

uk-drcog MCQ (SBA): Levothyroxine in Pregnancy

A 30-year-old woman with hypothyroidism controlled on levothyroxine 100 mcg daily presents to the GP at 6 weeks of gestation. Her most recent TSH was 2.1 mIU/L (pre-pregnancy). Which is the single most appropriate action regarding her levothyroxine?