Evidence map›Paper›PMID 42136059›Full record

ReviewHuman psychopharmacology2026

Underprescription of Clozapine: A Narrative Review Regarding 'Clozaphobia'.

Rafael Brito Castro, Joaquim J Ferreira, João Gama-Marques

Abstract readReview
In one paragraph

Review in Human psychopharmacology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Rafael Brito CastroClínica Universitária de Psiquiatria e Psicologia Médica (CUPPM), Faculdade de Medicina, Universidade de Lisboa (FMUL), Centro Académico de Medicina de Lisboa (CAML), Lisboa, Portugal.
Joaquim J FerreiraLaboratório de Farmacologia Clínica e Terapêutica (LFCT), Faculdade de Medicina, Universidade de Lisboa (FMUL), Centro Académico de Medicina de Lisboa (CAML), Lisboa, Portugal.ORCID 0000-0003-3950-5113
João Gama-MarquesClínica Universitária de Psiquiatria e Psicologia Médica (CUPPM), Faculdade de Medicina, Universidade de Lisboa (FMUL), Centro Académico de Medicina de Lisboa (CAML), Lisboa, Portugal.ORCID 0000-0003-0662-5178

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

This review aims to examine the appropriateness of the term 'clozaphobia' to characterise the obstacles contributing to the underprescription of clozapine (CLZ). English-language, peer-reviewed studies addressing clinicians', patients' and/or carers' attitudes toward CLZ were considered eligible for full-text review. In May 2025, a search was conducted using the keywords clozapine, clozaphobia, fear*, underus*, underprescri*, underutiliz*, and barrier*, restricted to titles and abstracts on PubMed, Web of Science, Scopus, and Cochrane. A total of 362 records were retrieved, and 30 records were identified through backward citation searching. After screening, 53 studies were eligible for review. This review identified several barriers to CLZ use, which were grouped into three broad domains: clinician-related, medication- and patient-related, and administrative-related barriers. Key barriers included difficulties in recognising Treatment-Resistant Schizophrenia (TRS) and identifying candidates for CLZ, lack of training and confidence, negative attitudes toward CLZ, variability in treatment pathways, concerns about CLZ's adverse effects, and challenges in convincing carers of the need for CLZ, insufficient resources, unclear professional roles, and fragmentation of services. The vast majority of identified barriers stem from misconceptions or negative attitudes toward CLZ, which unjustifiably limit patient access to this effective treatment, and can be addressed through the implementation of existing facilitating strategies. In such contexts, the term clozaphobia seems appropriate and its use may help to raise awareness and promote critical reflexion on this subject. With the end of the clozapine risk evaluation and mitigation strategy, it is now time to push society to start producing higher dose pills and a long-acting injectable version of clozapine.

Indexed as

Antipsychotic AgentsClozapineSchizophrenia, Treatment-ResistantAttitude of Health PersonnelHumansAntipsychotic AgentsClozapineclozaphobiaclozapineresistantschizophreniatreatment

Identifiers

PMID42136059
PMCPMC13176679

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.