Hypoxic-ischemic AC, TC and ATC are associated with a poor prognosis and a high rate of mortality. In younger patients with AC, TC and ATC and incomplete forms showing reactivity on the EEG, there is a greater probability of clinical recovery.

We describe the case of an elderly woman with an episode of ambulatory de novo absence status epilepticus of late onset (DNASLO) after oral treatment with cefuroxime. A high level of suspicion of DNASLO in cases of unexplained confusion in adults or elderly subjects taking cephalosporins is essential to prompt an emergency EEG and, in turn, rapidly achieve an appropriate diagnosis and enable optimal treatment.