Delusional disorder

Delusional disorder usually presents in middle to late life. It is characterised by delusions (grandiose, persecutory, erotomanic, somatic) lasting for at least 1 month and resulting in functional decline. Hallucinations, if present, are not prominent. If a first episode of delusional disorder is suspected, see Assessing a first episode of psychosis in adults and young people.

Treatment of delusional disorder is long term and multifaceted. For initial treatment, see Principles of treating a first episode of psychosis in adults and young people.