Status epilepticus is the name for any seizure that lasts a long time, or a series of seizures where the person doesn't regain consciousness in between.

It's a medical emergency and needs to be treated as soon as possible.

You can be trained to treat it if you look after someone with epilepsy. If you haven't had any training, call 999 for an ambulance immediately if someone has a seizure that hasn't stopped after 5 minutes.