What are the possible replacements of tegretol my doc can prescribe, concerned about its side effects?

Many other options: For starters, this is a discussion you should have with your doctor. There are many other options available depending on the type of seizure you are having. These include Vimpat, (lacosamide) lamotrigine, topiramate, phenytoin, Depakote--as well as many others. Again, I would talk with your doctor after your EEG--since different seizure types need different medications to treat them.