This is probably ancient history for you by now, but maybe it will help someone else. I am 35 and pregnant with my first child. I am tried every possible combination for my type of Epilepsy and I have to take 150mg of topiramate twice daily and 450mg of oxcarbazapine twice daily. It has increased abit since the pregnancy started but as it was described to me, the increase dosage seems scary but your level actually doesn't change because your body is just processing the drug differently than before. The baby is not getting any more or less of the drug either way than when you started. Also, the important thing to remember about those studies is that they are based off of a specific mg dosage per day (I believe it's 1200mg) before those effects take place (however, they are not tracking the levels which is what gives an accurate reading on how the drug is affecting each person). 300 mg in you, for example, may only give you a blood level of 3 but in me that same dosage would actully be therapuetic at 7. You just need to ask some educated question with your neurologist and you can have a healthy, happy pregnancy. My doctor has been very positive and I respect his opinion a great deal. There are aren't many docs I say that about these days.