Thanks for using healthcaremagic.I understand your concern. Brief answer: Yes can cause problems,if not managed properly. Detailed answer: If i am your physician,would suggest you with the following. Target is to prevent seizures and its effect on the fetus. 1)to avoid strenuous activity and other seizure provoking stimuli(as pregnancy a state of decreased seizure threshold) 2)Safe seizure medication,preferably with single drug(like oxcarbamazepine or lamotrigine) at lowest effective dose 3)Take folic acid supplement daily dose of 5mg particularly during 3 months prior to conception and in the first trimester to prevent the chances of fetal anomalies. 4) to avoid antacids or get appropriately treated for nausea,vomiting while you are on seizure medication Hope this information helps you.If any further questions,happy to answer you.Take care.