Shared Psychotic Disorder, also known as 'folie à deux', is a rare mental disorder characterized by the transmission of delusional beliefs from one person to another. In this disorder, a person (the primary case) who has a delusional belief, shares it with another person (the secondary case), and the secondary case starts to believe the delusion as well.
Shared Psychotic Disorder is categorized under the umbrella of 'delusional disorders' and is considered a subtype of 'delusional disorder induced by another person' in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5).
The primary case in Shared Psychotic Disorder usually has a long-standing delusion that is often bizarre and impossible. The secondary case starts to share this belief without any apparent reason, and the delusion is usually similar to the primary case. Symptoms may include:
The exact cause of Shared Psychotic Disorder is unknown. However, it is believed that the disorder can be triggered by a combination of genetic, environmental, and psychological factors. The disorder is more common in family members and people who have a history of mental illness.
Treatment for Shared Psychotic Disorder usually involves medication and psychotherapy. Antipsychotic medication is used to manage the delusions and other symptoms of the disorder. Psychotherapy can help the secondary case regain critical thinking skills and understand the difference between reality and delusion. It is also essential to identify and treat any underlying mental illness that may have contributed to the disorder.
Shared Psychotic Disorder is a rare and complex mental disorder that requires immediate treatment. It is important to seek medical help if you believe that you or someone you know may be suffering from the disorder. With proper treatment, people with Shared Psychotic Disorder can manage their symptoms and lead fulfilling lives.