Faculty of Medicine, University of Gadarif, Sudan. Apparent Refractory Epilepsy; Causes and Prevalence among Sudanese Patients at the National Center of Neurological Science, Khartoum 2018. The study concluded that, prevalence of apparent refractory epilepsy was 39.1%. The most common causes of apparent Refractory Epilepsy were uses of unsuitable combination of drugs, Family and genetic factors, wrong drug choice, and secondary etiologies of epilepsy.