Shared paranoid disorder preceded by cannabis abuse: case report

Area of Science:

• Psychiatry
• Toxicology

Background:

• Shared paranoid disorder, also known as folie à deux, is a rare psychiatric condition.
• Substance abuse, particularly cannabis, has been anecdotally linked to the onset of psychotic symptoms.

Observation:

• A married couple, socially isolated, developed shared paranoid disorder.
• The wife initiated the delusions, which were preceded by cannabis abuse.
• Following separation, the wife experienced intense fear and assaulted family members.

Findings:

• The delusions in both partners ceased rapidly after separation.
• Cohabitation without cannabis abuse did not lead to a relapse of the paranoid disorder.
• This case highlights the potential role of cannabis in the induction and maintenance of shared psychotic disorders.

Implications:

• Early identification and cessation of substance abuse are crucial in managing shared paranoid disorder.
• Separation can be an effective intervention for folie à deux, especially when substance-induced.
• Further research is needed to elucidate the neurobiological mechanisms linking cannabis use to shared psychotic experiences.