Hi Cedar.
One thing that's very important for you to do is to stay away from grapefruit and grapefruit juice while on trileptal because the enzymes in the fruit can mess up the trileptal just like it does with tegretol.
Some Drs. don't even pay attention to the side effects of AED's and how they interact with each other. I've often asked my pharmacist questions because my neuros don't know much about the AED's like a pharmacist does.
Each person is different but a lot of Drs. are watching the theraputic level of meds to be sure it doesn't become toxic and also if the drug level gets to high it can cause more sz. for some people. Here's wishing you well and May God Bless You!

Sue