Is it safe to take dilantin while pregnant or breastfeeding?

No: But it depends. It may be safer to stay on it than stop if that is the best drug to control seizures. It is a class d drug, meaning there is evidence of fetal risk, but the need to adequately control seizures may outweigh this risk. Discuss this with your doctor. It is considered compatible with breastfeeding by the american academy of pediatrics.

Pregnancy Category D: While Dilantin is considered a safe drug during breast feeding it is considered toxic to a fetus. Growth deficiency, decreased mental performance, changes in facial features and various other anomalies have been recorded.

Better options : Dilantin is a drug of the 1930's and has been supplanted by numerous more effective and safer medications. Does possess teratogenic potential, and does cause osteoporosis, and liver and bone marrow issues in many. Levels change meteorically in pregnancy, and tough to keep in therapy range. However, a convulsion could cause miscarriage. Would get a different med asap.