AssessmentsFetal hydantoin syndrome
Fetal hydantoin syndrome
USMLE® Step 1 style questions USMLE
USMLE® Step 2 style questions USMLE
A 2-week-old newborn is brought into the pediatrician's office for his first well-child visit. During the appointment, the mother is concerned that he is quite small, even for a baby, and that his head seems especially small. On physical examination the newborn is found to be below the 5th percentile for both length and head circumference. The pediatrician asks the mother if she drank during pregnancy which she denies. She then reveals that she has epilepsy and was taking her medication at regular dose throughout the pregnancy. Based on the newborn's presentation, which of the following drugs is most likely to cause his condition?