Epilepsy is a brain disease characterized by abnormal electrical activity causing seizures or unusual behaviour, sensations and sometimes loss of awareness. It carries neurological, cognitive, psychological and social consequences and accounts for a significant proportion of the world’s burden of disease. Despite availability of effective and low-cost anti-seizure medicines, more than 75% of people with epilepsy in low-income countries do not have access to treatment. This report is the product of a long-standing collaboration between WHO and leading nongovernmental organizations working in the area of epilepsy, the International League Against Epilepsy (ILAE) and the International Bureau for Epilepsy (IBE). Together we have made substantial progress in encouraging countries to prioritize epilepsy in public health agendas. Epilepsy: a public health imperative presents a comprehensive picture of the impact that the condition has on people with epilepsy, their families, communities and societies. Epilepsy has a high risk of disability, psychiatric comorbidity, social isolation and premature death. Across the world, people with epilepsy and their families suffer from stigma and discrimination. Many children with epilepsy do not go to school; adults are denied work, the right to drive or marriage. The human rights violations faced by people with epilepsy around the world are unacceptable. [...]