Patients are seen in the Johns Hopkins General Clinical Research Center (GCRC) and started on a modified Atkins diet (15g/day of carbohydrates). Medications remain unchanged and labs are drawn. Followup is at 1 month, 3 months, and 6 months into the study. After 1 month, carbohydrates and medications can be altered. Ketosis (urine) is measured by patients semiweekly, weight weekly, and seizures daily and recorded on a calendar.