Management of Phenytoin in Pregnancy

Introduction to Phenytoin Management

• The American Academy of Family Physicians recommends that women taking phenytoin who discover they are pregnant should immediately consult with their doctor to evaluate the risks and benefits of treatment, as abruptly stopping the medication could provoke severe seizures with grave consequences for both mother and fetus 2

Considerations for Phenytoin Use

• The American Academy of Family Physicians suggests considering the possibility of switching to an antiepileptic with a better safety profile during pregnancy if possible, and if phenytoin must be continued, using the lowest effective dose in monotherapy 2
• The American Academy of Family Physicians recommends supplementing with high doses of folic acid during pregnancy for women taking phenytoin 2

Lactation Considerations

• According to PLoS Medicine, phenytoin is compatible with breastfeeding according to standard recommendations 3

Treatment Adjustments

• The MMWR Recommendations and Reports notes that the interaction between phenytoin and other medications may be affected during pregnancy, requiring careful monitoring 1