Dr Manjari Tripathi, DM Neurology, FNASc, Professor Neurology, Head Unit II Neurology, Incharge center of excellence Epilepsy, NIH Fellow (UCLA), All India Institute Of Medical Sciences
A seizure is considered an emergency when it lasts a long time or when seizures occur close together and the person doesn't recover between seizures. Just like there are different types of seizures, there are also different types of emergencies.
Convulsive Status Epilepticus
This term is used to describe the more common form of emergency situation that can occur with prolonged or repeated tonic-clonic (also called convulsive or grand mal) seizures. Most tonic-clonic seizures end normally in 1 to 2 minutes, but they may have post-ictal (or after-effects) symptoms for much longer. This makes it hard to tell when a seizure begins and ends.
Status epilepticus occurs when
•   The active part of a tonic-clonic seizure lasts 5 minutes or longer