Shared psychotic disorder (DSM-IV-TR) or induced delusional disorder (ICD-10) is a condition involving the appearance of delusions to two or more subjects who generally live in close proximity. We compare three cases and their management described in Ramón y Cajal Hospital in Madrid.

The first case involves a mother and daughter shared delusion of injury with respect to the neighborhood. In the second case involves two sisters living together, with delusion of persecution and prejudice and without psychiatric history. The third one was admitted to our unit after a suicide attempts. It was a middle-aged man who shared with four members of his family the perception of supernatural entities in his home.

At the first and second cases it was necessary mechanical and pharmacological restraint. One of the therapeutic indications is the separation of subjects and It generated significant moments of tension and resources of the emergency department. In the third case was not accurate mechanical and pharmacological restraint. The most effective in this case was the regulation of sleep-wake cycle and separation of the individual during a time of home and family. In all three cases the perception of illness worked individually and kept contact with the therapists to plan responsible for monitoring the treatment plan and management in the future.

We must be prepared before the arrival of an event of this kind to the emergency of the hospital.It's necessary to elaborate an effective joint therapeutic strategy both during their hospital stay or as outpatients.