Background: Non–ketotic hyperglycemia (NKHG) may increase the probability of movement disorders and seizures. Methods: We describe a series of 18 patients admitted for seizures and movement disorders linked to NKHG. Results: Ten patients developed movement disorders and eight others seizure disorder. Glucose levels varied 297 mg/dl to 597 mg/dl. All patients responded well to insulin therapy and nine of them needed anti–epileptic drugs. Conclusion: Movement disorders or seizures in patients with NKHG could be misdiagnosed as  neurological diseases. Blood glucose must be audited whenever patients with seizures or movement disorders are encountered, as the condition may quickly resolve when NKHG is controlled.