A comparative study on the clinical efficacy and pregnancy outcomes of methimazole and propylthiouracil in managing pregnancy complicated with hyperthyroidism

The objective of the study was to compare the clinical efficacy and pregnancy outcomes of methimazole and propylthiouracil in managing hyperthyroidism during pregnancy. This retrospective analysis included 100 pregnant women with hyperthyroidism, who were divided into two groups: the methimazole group (Group A) and the propylthiouracil group (Group B). Indicators such as thyroid function, liver function, pregnancy outcomes, and newborn health were closely monitored. The results revealed that both groups experienced a reduction in thyroid function indicators, with Group B showing a more modest decrease. Group B exhibited a higher incidence of liver injury but also achieved more full-term pregnancies. There were no significant differences in adverse reactions, miscarriage rates, or cesarean rates between the two groups. Apgar scores were higher in Group B, while neonatal weights were comparable. We conclude that propylthiouracil improved thyroid function more substantially than methimazole although it was associated with a higher risk of liver injury.