First epileptic seizure is a fact that impacts the life of who suffers and its environment as a relationship with the possibility of a manifestation of epilepsy. It is one of the main causes of consultation in the emergency service, so neurologists and general doctors must have a basic and global knowledge of this. However, there are factors (provoked or unprovoked seizures, risk of recurrence) that it will allow to diagnose of epilepsy with the aim of establishing a timely pharmacological treatment that reduces the possibilities of a new crisis also to resolve the doubts that patients have regarding this disease.