**4.2 Etiology**

GDPs have been described in hypoxic anoxic encephalopathy, acute ischemic stroke, herpes encephalitis, Sepsis, Systemic lupus Erythematous (SLE), traumatic brain injury (TBI), hepatic encephalopathy, Hashimoto's encephalitis, hypo/ hypernatremia, uremia, renal failure, hypoglycemia, hypothyroidism, Epileptic Encephalopathy, Status Epilepticus (SE), Creurzfeld Jacob disease, Steroid responsive encephalopathy Subacute, Sclerosing Panencephalitis (SSPE), Alzheimer Disease, Benzodiazepines, Barbiturates, propofol withdrawal; with baclofen, lithium, Phencycline or ketamine, Tiagabine and Cyclosporine, Cefepime, and other cephalosporines [27–31].
