Methimazole, Carbimazole, And Congenital Skin Defects
January 1987
in “
Annals of Internal Medicine
”
TLDR Methimazole may cause skin defects in babies if taken during pregnancy.
The document discussed concerns about the use of methimazole, an antithyroid drug, during pregnancy due to its potential association with congenital skin defects, specifically aplasia cutis. Two studies highlighted this risk, with one study from 1972 describing 12 cases of congenital scalp defects, where methimazole was used by the mothers in three instances, including a case with fraternal twins. The document suggested caution in prescribing methimazole to pregnant women with hyperthyroidism, as noted by reviews from Burrow and Cooper.