This guidance provides recommendations to sponsors on the clinical development of drugs for the treatment of partial onset seizures (POS) in pediatric patients. Specifically, this guidance addresses FDA’s current thinking regarding clinical development programs that can support extrapolation of the efficacy of drugs approved for the treatment of POS in adults to pediatric patients 2 years of age and older. This guidance does not address clinical development programs for the treatment of POS in pediatric patients younger than 2 years of age. This guidance does not address the development of drugs to treat other types of seizures.