Ketogenic diet (KD) refers to promising methods of treatment of epilepsy resistant to anticonvulsants. A clinical case of the use of KD in a child with drug resistant epilepsy (DRE) is presented. This clinical case demonstrates the effectiveness of KD in a child with DRE in the form of achieving 100% control over seizures and positive shifts in the psycho-motor development of the child and positive changes in the child’s psychomotor development while ensuring adequate physical health.