Psych · General adult psychiatry — psychosis
Treatment-resistant schizophrenia
Also known as TRS · Treatment refractory schizophrenia · Clozapine-eligible schizophrenia · Ultra-treatment-resistant schizophrenia · TRRIP treatment resistance · Clozapine-resistant schizophrenia
Exam-exhaustive fellowship reference on treatment-resistant schizophrenia — TRRIP criteria, pseudo-resistance, LAI before labelling, clozapine pathway core, ultra-treatment resistance, ECT augmentation, psychosocial care, and regional guideline deltas. FRANZCP-primary, globally tagged.
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Target exams
Red flags
- Active suicidal intent, plan, or recent attempt in a patient labelled TRS — escalate care intensity; clozapine has anti-suicide evidence in high-risk schizophrenia and is not a slow optional luxury
- Command hallucinations with compliance risk, severe paranoia driving violence, catatonia, or dangerous self-neglect — risk management first, not another incomplete oral trial
- Pseudo-resistance mislabelled as TRS: non-adherence, under-dosing, substances, or organic psychosis — LAI and levels before the TRS stamp
- Clozapine without monitoring infrastructure — no bloods, no drug; myocarditis window (fever, tachycardia, chest pain early); constipation progressing to ileus
- Declaring clozapine failure without adequate dose, duration, plasma level, and adherence check
- Years of polypharmacy while delaying a TRRIP-guided clozapine offer
Meet the patient
A 29-year-old man, eleven years unwell, arrives on his fifth antipsychotic. The referral letter says "treatment-resistant." The medication history says something else entirely.[1][12]
Olanzapine 5 mg for three weeks. Quetiapine 200 mg, stopped for sedation. Risperidone, dispensed weekly, with a pharmacy record showing he collected it four times in nine months. Aripiprazole, current, at 10 mg.[1][20]
He has never had an adequate trial of anything. He is not treatment-resistant. He has never been treated.[1][12]
References20ShowHide
- [1]Howes OD, McCutcheon R, Agid O, et al. Treatment-Resistant Schizophrenia: Treatment Response and Resistance in Psychosis (TRRIP) Working Group Consensus Guidelines on Diagnosis and Terminology Am J Psychiatry, 2017.PMID 27919182
- [2]Kane J, Honigfeld G, Singer J, et al. Clozapine for the treatment-resistant schizophrenic. A double-blind comparison with chlorpromazine. Arch Gen Psychiatry, 1988.PMID 3046553
- [3]McEvoy JP, Lieberman JA, Stroup TS, et al. Effectiveness of clozapine versus olanzapine, quetiapine, and risperidone in patients with chronic schizophrenia who did not respond to prior atypical antipsychotic treatment Am J Psychiatry, 2006.PMID 16585434
- [4]Lieberman JA, Stroup TS, McEvoy JP, et al. Effectiveness of antipsychotic drugs in patients with chronic schizophrenia N Engl J Med, 2005.PMID 16172203
- [5]Samara MT, Dold M, Gianatsi M, et al. Efficacy, Acceptability, and Tolerability of Antipsychotics in Treatment-Resistant Schizophrenia: A Network Meta-analysis JAMA Psychiatry, 2016.PMID 26842482
- [6]Siskind D, McCartney L, Goldschlager R, et al. Clozapine v. first- and second-generation antipsychotics in treatment-refractory schizophrenia: systematic review and meta-analysis Br J Psychiatry, 2016.PMID 27388573
- [7]Siskind D, Siskind V, Kisely S Clozapine Response Rates among People with Treatment-Resistant Schizophrenia: Data from a Systematic Review and Meta-Analysis Can J Psychiatry, 2017.PMID 28655284
- [8]Meltzer HY, Alphs L, Green AI, et al. Clozapine treatment for suicidality in schizophrenia: International Suicide Prevention Trial (InterSePT) Arch Gen Psychiatry, 2003.PMID 12511175
- [9]Petrides G, Malur C, Braga RJ, et al. Electroconvulsive therapy augmentation in clozapine-resistant schizophrenia: a prospective, randomized study Am J Psychiatry, 2015.PMID 25157964
- [10]Galletly C, Castle D, Dark F, et al. Royal Australian and New Zealand College of Psychiatrists clinical practice guidelines for the management of schizophrenia and related disorders Aust N Z J Psychiatry, 2016.PMID 27106681
- [11]Keepers GA, Fochtmann LJ, Anzia JM, et al. The American Psychiatric Association Practice Guideline for the Treatment of Patients With Schizophrenia Am J Psychiatry, 2020.PMID 32867516
- [12]Kane JM, Agid O, Baldwin ML, et al. Clinical Guidance on the Identification and Management of Treatment-Resistant Schizophrenia J Clin Psychiatry, 2019.PMID 30840788
- [13]Agid O, Arenovich T, Sajeev G, et al. An algorithm-based approach to first-episode schizophrenia: response rates over 3 prospective antipsychotic trials with a retrospective data analysis J Clin Psychiatry, 2011.PMID 21457676
- [14]Lally J, Ajnakina O, Di Forti M, et al. Two distinct patterns of treatment resistance: clinical predictors of treatment resistance in first-episode schizophrenia spectrum psychoses Psychol Med, 2016.PMID 27605254
- [15]Demjaha A, Lappin JM, Stahl D, et al. Antipsychotic treatment resistance in first-episode psychosis: prevalence, subtypes and predictors Psychol Med, 2017.PMID 28395674
- [16]Wagner E, Löhrs L, Siskind D, et al. Clozapine augmentation strategies - a systematic meta-review of available evidence. Treatment options for clozapine resistance J Psychopharmacol, 2019.PMID 30696332
- [17]Campana M, Falkai P, Siskind D, et al. Characteristics and definitions of ultra-treatment-resistant schizophrenia - A systematic review and meta-analysis Schizophr Res, 2021.PMID 33454644
- [18]Howes OD, Kapur S The dopamine hypothesis of schizophrenia: version III--the final common pathway Schizophr Bull, 2009.PMID 19325164
- [19]Dixon LB, Dickerson F, Bellack AS, et al. The 2009 schizophrenia PORT psychosocial treatment recommendations and summary statements Schizophr Bull, 2010.PMID 19955389
- [20]Kishimoto T, Robenzadeh A, Leucht C, et al. Long-acting injectable vs oral antipsychotics for relapse prevention in schizophrenia: a meta-analysis of randomized trials Schizophr Bull, 2014.PMID 23256986