The more milligrams daily she takes, the more risks there are. Seizure control plays the key role in whether her medicine can be reduced to risks. A woman with seizures has a difficult time even when not pregnant. The goal is not to sacrifice a woman's health for the sake of her child. If a medicine reduction caused her to have increased seizures, she'd have less strength and endurance to endure the birth process ahead of her.
Some women have an increase, some a decrease in seizures, and some no change at all.
A woman and her child, provided that she followed the precautionary route to child planning, she'll be rewarded with a healthy, beautiful son or daughter. What she'll need to do if her seizures are not under control are to find ways of safeguarding her child from injury accidentally caused by seizures that don't give her adequate warning time. She needs to create a Network of close family and friends that can be with her through the day, or arrange a live-in roommate. It is difficult enough preventing injury on herself let alone a fragile child that she sacrificed so much to bring into the world. Remember, though it can be done.