Psych · General adult psychiatry — personality disorders
Paranoid personality disorder
Also known as PPD · Paranoid PD · Cluster A personality disorder · Suspicious personality
Exam-exhaustive fellowship reference on paranoid personality disorder — DSM-5-TR and ICD-11 nosology; differentials from delusional disorder and schizophrenia spectrum; trauma-linked threat-bias mechanisms; alliance-first psychotherapy; pharmacotherapy limits; risk of retaliation and litigation. FRANZCP-primary, globally tagged.
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Target exams
Red flags
- Imminent retaliatory planning, weapons access, or identifiable victim threat — prioritise safety and multi-agency response under local law
- Late-onset 'paranoid personality' without lifelong pattern — investigate organic disease, substances, mood and psychosis pathways first
- Frank fixed delusions, hallucinations, or marked functional collapse — treat on a psychosis pathway; do not dismiss as 'just PPD'
- Acute stimulant or cannabis-driven paranoia superimposed on trait mistrust — medical stabilisation and UDS before personality formulation
- Therapeutic nihilism that withholds treatment of depression, PTSD, or substance use because 'they will never engage'
- Early confrontational challenge of core beliefs that destroys alliance and increases dropout/risk
Meet the patient
A 46-year-old man is referred by his GP after four years of workplace grievances, two employment tribunals and a formal complaint about the GP. He arrives twelve minutes early, declines to sit with his back to the door, and asks whether you record consultations. He does not want to talk about personality. He wants to talk about his sleep.[1][3]
Everything you have been taught about "engagement" is now on trial. Challenge the grievance and he is gone by minute six. Agree with it and you have joined the complaint. The examiner's question: what do you actually say first?[1][4]
The answer is the sleep. This topic is about why.[1][3]
References16ShowHide
- [1]Lee R Mistrustful and Misunderstood: A Review of Paranoid Personality Disorder Curr Behav Neurosci Rep, 2017.PMID 29399432
- [2]Triebwasser J, Chemerinski E, Roussos P, Siever LJ Paranoid personality disorder J Pers Disord, 2013.PMID 22928850
- [3]Jain L, Torrico T Paranoid Personality Disorder StatPearls, 2026.PMID 39163470
- [4]Cheli S, Wisepape CN, Witten CDY, Floridi M, et al. Psychosocial and pharmacological interventions for cluster a personality disorders: A systematic review and two exploratory meta-analyses Personal Disord, 2025.PMID 40111791
- [5]Kellett S, Hardy G Treatment of paranoid personality disorder with cognitive analytic therapy: a mixed methods single case experimental design Clin Psychol Psychother, 2014.PMID 23733739
- [6]Koch J, Modesitt T, Palmer M, Ward S, et al. Review of pharmacologic treatment in cluster A personality disorders Ment Health Clin, 2016.PMID 29955451
- [7]Torgersen S, Kringlen E, Cramer V The prevalence of personality disorders in a community sample Arch Gen Psychiatry, 2001.PMID 11386989
- [8]Lenzenweger MF, Lane MC, Loranger AW, Kessler RC DSM-IV personality disorders in the National Comorbidity Survey Replication Biol Psychiatry, 2007.PMID 17217923
- [9]Grant BF, Hasin DS, Stinson FS, Dawson DA, et al. Prevalence, correlates, and disability of personality disorders in the United States: results from the national epidemiologic survey on alcohol and related conditions J Clin Psychiatry, 2004.PMID 15291684
- [10]Edens JF, Marcus DK, Morey LC Paranoid personality has a dimensional latent structure: taxometric analyses of community and clinical samples J Abnorm Psychol, 2009.PMID 19685951
- [11]Bamelis LL, Evers SM, Spinhoven P, Arntz A Results of a multicenter randomized controlled trial of the clinical effectiveness of schema therapy for personality disorders Am J Psychiatry, 2014.PMID 24322378
- [12]Rosell DR, Futterman SE, McMaster A, Siever LJ Schizotypal personality disorder: a current review Curr Psychiatry Rep, 2014.PMID 24828284
- [13]Kendler KS, Aggen SH, Czajkowski N, Røysamb E, et al. The structure of genetic and environmental risk factors for DSM-IV personality disorders: a multivariate twin study Arch Gen Psychiatry, 2008.PMID 19047531
- [14]Coid J, Yang M, Tyrer P, Roberts A, et al. Prevalence and correlates of personality disorder in Great Britain Br J Psychiatry, 2006.PMID 16648528
- [15]Opjordsmoen S Delusional disorder as a partial psychosis Schizophr Bull, 2014.PMID 24421383
- [16]Cheli S, Cavalletti V, Popolo R, Dimaggio G A case study on a severe paranoid personality disorder client treated with metacognitive interpersonal therapy J Clin Psychol, 2021.PMID 34263957