Maybe you went up to 100 too quickly. Maybe 50 would be better. I take 100 but im a pretty big girl. The highest i took was 400, but i was literally falling over. I hardly noticed 25 mg. If it was effective for you, then why not stay there? I had other epilepsy issues that the med " found" and is controlling - if you dont have those issues, then the full force of it is being experienced.