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Horowitz MA, Moncrieff J. Gradually tapering off antipsychotics: lessons for practice from case studies and neurobiological principles. Curr Opin Psychiatry 2024; 37:320-330. [PMID: 38726815 PMCID: PMC11139239 DOI: 10.1097/yco.0000000000000940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
PURPOSE OF REVIEW There has been an increasing focus on deprescribing in psychiatry recently, particularly of antipsychotic medication, with recognition that not all patients with psychotic disorders require lifelong medication. We summarize some empirical and theoretical papers, and examine case studies to provide instruction on this topic. RECENT FINDINGS Recent studies have found that slower tapering (over months or longer) of antipsychotics is associated with a lower relapse rate than quicker tapering (weeks). Case studies presented suggest that the process of reduction is associated with the precipitation or exacerbation of psychotic symptoms and that a slower process of reduction may minimize this effect. This may be because faster reductions cause greater disruption of homeostatic equilibria, provoking psychotic symptoms either as direct withdrawal symptoms or consequences of nonpsychotic withdrawal symptoms (e.g. insomnia) - although not all patients will experience withdrawal symptoms. This suggests that smaller dose reductions, especially at lower doses, made very gradually, may minimize the risk of psychotic symptoms. SUMMARY Slower tapering of antipsychotics may provide time for adaptations made to the presence of the medications to resolve, thus reducing the disruption to homeostatic equilibrium caused by dose reduction, potentially reducing the risk of relapse. Exacerbation of psychotic symptoms on antipsychotic reduction may not represent evidence of the need for a higher dose of antipsychotic on a long-term basis but may indicate the need for more gradual reduction. Gradual reduction of antipsychotics, especially after long-term use in clinical practice is prudent.
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Affiliation(s)
- Mark A. Horowitz
- Division of Psychiatry, University College London, Maple House, Fitzrovia, London
- North East London Foundation Trust, Goodmayes Hospital, Goodmayes, Ilford, UK
| | - Joanna Moncrieff
- Division of Psychiatry, University College London, Maple House, Fitzrovia, London
- North East London Foundation Trust, Goodmayes Hospital, Goodmayes, Ilford, UK
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Bickerton L, Kuriakose JL. Management of Cholinergic Rebound After Abrupt Withdrawal of Clozapine: A Case Report and Systematic Literature Review. J Acad Consult Liaison Psychiatry 2024; 65:76-88. [PMID: 37838358 DOI: 10.1016/j.jaclp.2023.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 09/13/2023] [Accepted: 10/06/2023] [Indexed: 10/16/2023]
Abstract
BACKGROUND Cholinergic discontinuation symptoms, also known as "cholinergic rebound," from abrupt clozapine discontinuation are characterized by a range of somatic and psychiatric symptoms. OBJECTIVE The objective of this study was to describe the clinical features and management options for clozapine withdrawal-associated cholinergic rebound syndrome (henceforth referred to as CWCRS) and present an illustrative case report. METHODS Based on a literature search of the databases PubMed, OVID Medline, and Embase as well as reviewing reference lists of relevant past reviews, we carried out a systematic review of case reports on the management of CWCRS from 1946 to 2023. RESULTS We identified 10 previously published articles on the clinical management of CWCRS, with a total of 18 patients (6 female, 12 male) with an average age of 43 years (standard deviation 14). Half of the patients had a history of tardive dyskinesia. The mean dose of clozapine before discontinuation was 351 mg/day, with duration of clozapine treatment ranging from 3 weeks to 9 years. Clozapine was the most effective treatment, followed by benztropine. CONCLUSIONS Given the small number of cases and the nonexperimental nature of the available studies, this review could not provide reliable data to guide management of CWCRS. The findings, however, suggest that clozapine may be more effective than other commonly used treatment options. With the high rates of discontinuation among patients on clozapine, there is a pressing need for further research into the epidemiology, natural history, and management of clozapine withdrawal syndromes.
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Affiliation(s)
- Lucy Bickerton
- Northwell Health, Zucker Hillside Hospital, Glen Oaks, NY.
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Oloyede E, Dima A, Taylor D, Cheung H, Dzahini O, Shergill S, Whiskey E. Clozapine augmentation with long-acting antipsychotic injections: A case series and systematic review. Acta Psychiatr Scand 2023; 148:538-552. [PMID: 37899506 DOI: 10.1111/acps.13621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/17/2023] [Accepted: 09/24/2023] [Indexed: 10/31/2023]
Abstract
BACKGROUND Up to 30% of patients with a diagnosis of treatment-resistant psychosis remain symptomatic despite an optimal trial with the gold standard treatment, clozapine. Emerging evidence suggests the clinical utility of long-acting injections (LAI) in such clinical scenarios. In this study, we aimed to describe clozapine augmentation with LAIs in an inner London hospital and explore the literature on the clinical effectiveness of this treatment modality. METHODS Patients prescribed clozapine, who were commenced on a LAI between 2007 and 2023 by the United Kingdom's largest mental health trust, were identified from electronic patient records. First, routine clinical data were used to describe the use, effectiveness, and safety of this augmentation strategy. Second, we conducted a literature search up to 1st June 2023 to identify published studies describing clinical outcomes after clozapine augmentation with a LAI. Clinical outcomes were collated and presented in a table, including hospitalisation rates and quantitative clinical assessments using validated scales. RESULTS Of the 1248 patients prescribed clozapine in SLaM, three patients (0.2%) received augmentation with the following LAIs: olanzapine embonate, paliperidone palmitate and pipotiazine palmitate. This treatment strategy was clinically effective and generally well tolerated in all three cases. Twelve published studies between 2010 and 2022 were included in the review. Eight distinct LAIs were reported (4 first and 4 second generation antipsychotics), with risperidone and paliperidone most widely studied. All the identified studies were observational including mirror-image studies, case series and case reports. Duration of follow up varied from 3 months to 3 years. There was evidence that the use of LAIs with clozapine can significantly reduce clinical symptoms, hospitalisation rates and bed days. No serious adverse effects were reported. CONCLUSION This preliminary evidence suggests clinical utility of LAIs in alleviating residual symptoms and subsequently reducing hospitalisation rates in patients optimised on clozapine treatment. The current study warrants further investigations including a randomised controlled study to establish the clinical efficacy, tolerability, and place in therapy of this treatment modality.
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Affiliation(s)
- Ebenezer Oloyede
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK
| | - Aikaterini Dima
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK
- Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
| | - David Taylor
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK
- Institute of Pharmaceutical Science, King's College London, London, UK
| | - Henry Cheung
- Pharmacy Department, South West London and St George's Mental Health NHS Trust, London, UK
| | - Olubanke Dzahini
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK
- Institute of Pharmaceutical Science, King's College London, London, UK
| | - Sukhi Shergill
- Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
- Medical School, Kent and Medway NHS and Social Care Partnership Trust, Chatham, UK
| | - Eromona Whiskey
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK
- Institute of Pharmaceutical Science, King's College London, London, UK
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Fukuyama K, Motomura E, Okada M. A Novel Gliotransmitter, L-β-Aminoisobutyric Acid, Contributes to Pathophysiology of Clinical Efficacies and Adverse Reactions of Clozapine. Biomolecules 2023; 13:1288. [PMID: 37759688 PMCID: PMC10526296 DOI: 10.3390/biom13091288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/18/2023] [Accepted: 08/22/2023] [Indexed: 09/29/2023] Open
Abstract
Clozapine is listed as one of the most effective antipsychotics and has been approved for treating treatment-resistant schizophrenia (TRS); however, several type A and B adverse reactions, including weight gain, metabolic complications, cardiotoxicity, convulsions, and discontinuation syndromes, exist. The critical mechanisms of clinical efficacy for schizophrenia, TRS, and adverse reactions of clozapine have not been elucidated. Recently, the GABA isomer L-β-aminoisobutyric acid (L-BAIBA), a protective myokine in the peripheral organs, was identified as a candidate novel transmission modulator in the central nervous system (CNS). L-BAIBA activates adenosine monophosphate-activated protein kinase (AMPK) signalling in both the peripheral organs and CNS. Activated AMPK signalling in peripheral organs is an established major target for treating insulin-resistant diabetes, whereas activated AMPK signalling in the hypothalamus contributes to the pathophysiology of weight gain and metabolic disturbances. Clozapine increases L-BAIBA synthesis in the hypothalamus. In addition, the various functions of L-BAIBA in the CNS have recently been elucidated, including as an activator of GABA-B and group-III metabotropic glutamate (III-mGlu) receptors. Considering the expressions of GABA-B and III-mGlu receptors (localised in the presynaptic regions), the activation of GABA-B and III-mGlu receptors can explain the distinct therapeutic advantages of clozapine in schizophrenia or TRS associated with N-methyl-D-aspartate (NMDA) receptor disturbance compared with other atypical antipsychotics via the inhibition of the persistent tonic hyperactivation of thalamocortical glutamatergic transmission in the prefrontal cortex. L-BAIBA has also been identified as a gliotransmitter, and a detailed exploration of the function of L-BAIBA in tripartite synaptic transmission can further elucidate the pathophysiology of effectiveness for treating TRS and/or specific adverse reactions of clozapine.
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Affiliation(s)
| | | | - Motohiro Okada
- Department of Neuropsychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, Tsu 514-8507, Japan; (K.F.); (E.M.)
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Jagota G, Grover S. Clozapine withdrawal catatonia: A case report. Indian J Psychiatry 2023; 65:797-798. [PMID: 37645360 PMCID: PMC10461577 DOI: 10.4103/indianjpsychiatry.indianjpsychiatry_191_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 06/06/2023] [Accepted: 06/17/2023] [Indexed: 08/31/2023] Open
Affiliation(s)
- Gopika Jagota
- Department of Psychiatry, Post Graduate Institute of Medical Education and Research, Chandigarh, India E-mail:
| | - Sandeep Grover
- Department of Psychiatry, Post Graduate Institute of Medical Education and Research, Chandigarh, India E-mail:
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Oloyede E, Dunnett D, Taylor D, Clark I, MacCabe JH, Whiskey E, Onwumere J. The lived experience of clozapine discontinuation in patients and carers following suspected clozapine-induced neutropenia. BMC Psychiatry 2023; 23:413. [PMID: 37291505 PMCID: PMC10249299 DOI: 10.1186/s12888-023-04902-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 05/25/2023] [Indexed: 06/10/2023] Open
Abstract
BACKGROUND Clozapine is the treatment of choice in refractory psychosis. In most countries, clozapine must be stopped indefinitely if white blood cells fall below a defined threshold during routine monitoring. Despite evidence of severe adverse consequences of clozapine discontinuation, published accounts on the lived experiences and perspectives of patients and carers are scarce. METHOD We completed semi-structured interviews with patients (n = 4) and family carers (n = 4) on experiences of clozapine cessation following suspected drug-induced neutropenia. Interviews were audio-recorded, transcribed and analysed thematically. RESULTS The two overarching themes comprised:(i) stress of clozapine below threshold neutrophil results and (ii) patient and carer priorities. CONCLUSIONS There is a suggested need for evidence-based pharmacological and psychological approaches to support patients and carers after clozapine cessation. Such approaches will minimise the potentially negative physical and emotional sequela in the aftermath of a below threshold neutrophil result and reduce the likelihood of experiencing additional health and social inequalities after clozapine discontinuation.
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Affiliation(s)
- Ebenezer Oloyede
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK.
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, King's College London, London, UK.
- University of Oxford, Department of Psychiatry , Warneford, United Kingdom.
| | - Danielle Dunnett
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, King's College London, London, UK
| | - David Taylor
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK
- Institute of Pharmaceutical Science, King's College, London 5th Floor, Franklin-Wilkins Building 150 Stamford Street, London, SE1 9NH, UK
| | - Ivana Clark
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK
- Institute of Pharmaceutical Science, King's College, London 5th Floor, Franklin-Wilkins Building 150 Stamford Street, London, SE1 9NH, UK
| | - James H MacCabe
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, King's College London, London, UK
- National Psychosis Service, South London and Maudsley NHS Foundation Trust, London, UK
- NIHR Biomedical Research Centre for Mental Health South London and Maudsley NHS, London, UK
| | - Eromona Whiskey
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK
- Institute of Pharmaceutical Science, King's College, London 5th Floor, Franklin-Wilkins Building 150 Stamford Street, London, SE1 9NH, UK
- National Psychosis Service, South London and Maudsley NHS Foundation Trust, London, UK
| | - Juliana Onwumere
- National Psychosis Service, South London and Maudsley NHS Foundation Trust, London, UK
- NIHR Biomedical Research Centre for Mental Health South London and Maudsley NHS, London, UK
- Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
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Fukuyama K, Motomura E, Okada M. Enhanced L-β-Aminoisobutyric Acid Is Involved in the Pathophysiology of Effectiveness for Treatment-Resistant Schizophrenia and Adverse Reactions of Clozapine. Biomolecules 2023; 13:biom13050862. [PMID: 37238731 DOI: 10.3390/biom13050862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/14/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023] Open
Abstract
Clozapine is an effective antipsychotic for the treatment of antipsychotic-resistant schizophrenia; however, specific types of A/B adverse effects and clozapine-discontinuation syndromes are also well known. To date, both the critical mechanisms of clinical actions (effective for antipsychotic-resistant schizophrenia) and the adverse effects of clozapine remain to be elucidated. Recently, we demonstrated that clozapine increased the synthesis of L-β-aminoisobutyric acid (L-BAIBA) in the hypothalamus. L-BAIBA is an activator of the adenosine monophosphate-activated protein kinase (AMPK), glycine receptor, GABAA receptor, and GABAB receptor (GABAB-R). These targets of L-BAIBA overlap as potential targets other than the monoamine receptors of clozapine. However, the direct binding of clozapine to these aminoacidic transmitter/modulator receptors remains to be clarified. Therefore, to explore the contribution of increased L-BAIBA on the clinical action of clozapine, this study determined the effects of clozapine and L-BAIBA on tripartite synaptic transmission, including GABAB-R and the group-III metabotropic glutamate receptor (III-mGluR) using cultured astrocytes, as well as on the thalamocortical hyper-glutamatergic transmission induced by impaired glutamate/NMDA receptors using microdialysis. Clozapine increased astroglial L-BAIBA synthesis in time/concentration-dependent manners. Increased L-BAIBA synthesis was observed until 3 days after clozapine discontinuation. Clozapine did not directly bind III-mGluR or GABAB-R, whereas L-BAIBA activated these receptors in the astrocytes. Local administration of MK801 into the reticular thalamic nucleus (RTN) increased L-glutamate release in the medial frontal cortex (mPFC) (MK801-evoked L-glutamate release). Local administration of L-BAIBA into the mPFC suppressed MK801-evoked L-glutamate release. These actions of L-BAIBA were inhibited by antagonists of III-mGluR and GABAB-R, similar to clozapine. These in vitro and in vivo analyses suggest that increased frontal L-BAIBA signaling likely plays an important role in the pharmacological actions of clozapine, such as improving the effectiveness of treating treatment-resistant schizophrenia and several clozapine discontinuation syndromes via the activation of III-mGluR and GABAB-R in the mPFC.
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Affiliation(s)
- Kouji Fukuyama
- Department of Neuropsychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, Tsu 514-8507, Japan
| | - Eishi Motomura
- Department of Neuropsychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, Tsu 514-8507, Japan
| | - Motohiro Okada
- Department of Neuropsychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, Tsu 514-8507, Japan
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Leung JG. Part
II
: Interactive case—Clinical pearls of clozapine. JOURNAL OF THE AMERICAN COLLEGE OF CLINICAL PHARMACY 2023. [DOI: 10.1002/jac5.1765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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9
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Ito Y, Murata M, Taku O, Fukuyama K, Motomura E, Dohi K, Okada M. Developed catatonia with rhabdomyolysis and exacerbated cardiac failure upon switching from clozapine to olanzapine owing to cardiomyopathy during clozapine medication - A case report. Asian J Psychiatr 2023; 80:103376. [PMID: 36493522 DOI: 10.1016/j.ajp.2022.103376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/26/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022]
Affiliation(s)
- Yuki Ito
- Department of Neuropsychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, Tsu 514-8507, Japan; Department of Psychiatry, National Hospital Organization Sakakibara Hospital, 777 Sakakibara, Tsu, Mie 514-1292, Japan.
| | - Masahiko Murata
- Department of Psychiatry, National Hospital Organization Sakakibara Hospital, 777 Sakakibara, Tsu, Mie 514-1292, Japan.
| | - Omori Taku
- Department of Cardiology and Nephrology, Graduate School of Medicine, Mie University, Tsu 514-8507, Japan.
| | - Kouji Fukuyama
- Department of Neuropsychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, Tsu 514-8507, Japan.
| | - Eishi Motomura
- Department of Neuropsychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, Tsu 514-8507, Japan.
| | - Kaoru Dohi
- Department of Cardiology and Nephrology, Graduate School of Medicine, Mie University, Tsu 514-8507, Japan.
| | - Motohiro Okada
- Department of Neuropsychiatry, Division of Neuroscience, Graduate School of Medicine, Mie University, Tsu 514-8507, Japan.
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Takeuchi H, Watabe K. Does short-term antipsychotic discontinuation of up to 3 weeks worsen symptoms in acute schizophrenia? A pooled analysis of placebo washout data. Psychiatry Clin Neurosci 2023. [PMID: 36700595 DOI: 10.1111/pcn.13534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 12/30/2022] [Accepted: 01/22/2023] [Indexed: 01/27/2023]
Abstract
AIM This study aimed to examine symptom changes during short-term discontinuation of antipsychotics up to 3 weeks including the placebo washout phase in acute schizophrenia. METHODS The data from three double-blind, randomized, controlled trials comparing lurasidone versus placebo in patients with acute exacerbation of schizophrenia were analyzed. Symptom severity was assessed using the Positive and Negative Syndrome Scale (PANSS) total and the Clinical Global Impression-Severity scale (CGI-S) scores. The scores before and after the antipsychotic discontinuation phase were compared, and factors associated with score changes were explored. RESULTS Among 2154 patients participating in the trials, 600 who received antipsychotic monotherapy and completed the antipsychotic discontinuation phase were included in the analysis. No patients received clozapine. The mean duration of the discontinuation phase was 5.9 ± 2.5 days. The PANSS total and CGI-S scores significantly changed from 94.0 ± 9.5 to 95.4 ± 10.5 (P < 0.001) and from 4.9 ± 0.6 to 4.9 ± 0.7 (P = 0.041), respectively, during this phase; however, the absolute difference was minimal. The score changes were not associated with the type or dose of prior antipsychotics, or the duration or strategy (abrupt vs gradual) of antipsychotic discontinuation. CONCLUSIONS Symptoms may not worsen to a clinically meaningful degree after short-term discontinuation of non-clozapine antipsychotics up to 3 weeks in patients with acute exacerbation of schizophrenia, suggesting that antipsychotic efficacy persists at least several days after discontinuation. This finding supports once-daily dosing regimen of antipsychotics and abrupt antipsychotic discontinuation when switching to another antipsychotic.
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Affiliation(s)
- Hiroyoshi Takeuchi
- Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan
| | - Kei Watabe
- Department of Data Science, Drug Development Division, Sumitomo Pharma Co., Ltd., Tokyo, Japan
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Ansari S, Kelbrick M, Paduret G, Diaz N, Menzel R, Rogers R, Wareham C, Griffiths C, Jugon S, Tidy K, Johnson S, Mann N, Tanner J, Millward T, Latif S. Clinical practice guideline for clozapine use in patients with
COVID
‐19. PROGRESS IN NEUROLOGY AND PSYCHIATRY 2023. [DOI: 10.1002/pnp.779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- Saba Ansari
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Marlene Kelbrick
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Gabriela Paduret
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Natasha Diaz
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Rose Menzel
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Rowena Rogers
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Claire Wareham
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Chris Griffiths
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Sue Jugon
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Katy Tidy
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Sara Johnson
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Nick Mann
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - James Tanner
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Tim Millward
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
| | - Shahid Latif
- Dr Ansari is a Specialty Registrar (ST5); Dr Kelbrick is a Consultant Psychiatrist; Dr Paduret is a Core Trainee Year 2; Ms Diaz is a Physical Health Advanced Nurse Practitioner; Ms Menzel is a Pharmacist; Ms Rowena Rogers is a Community Mental Health Nurse; Ms Wareham is a Community Mental Health Nurse; Dr Griffiths is a Senior Research and Evaluation Fellow; Ms Jugon is a EIP operations Manager; Ms Tidy is a CMHT Operations Manager; Ms Johnson is a Ward Matron; Dr Mann, Dr Tanner, Dr Millward, Dr
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12
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Qubad M, Bittner RA. Second to none: rationale, timing, and clinical management of clozapine use in schizophrenia. Ther Adv Psychopharmacol 2023; 13:20451253231158152. [PMID: 36994117 PMCID: PMC10041648 DOI: 10.1177/20451253231158152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 01/24/2023] [Indexed: 03/31/2023] Open
Abstract
Despite its enduring relevance as the single most effective and important evidence-based treatment for schizophrenia, underutilization of clozapine remains considerable. To a substantial degree, this is attributable to a reluctance of psychiatrists to offer clozapine due to its relatively large side-effect burden and the complexity of its use. This underscores the necessity for continued education regarding both the vital nature and the intricacies of clozapine treatment. This narrative review summarizes all clinically relevant areas of evidence, which support clozapine's wide-ranging superior efficacy - for treatment-resistant schizophrenia (TRS) and beyond - and make its safe use eminently feasible. Converging evidence indicates that TRS constitutes a distinct albeit heterogeneous subgroup of schizophrenias primarily responsive to clozapine. Most importantly, the predominantly early onset of treatment resistance and the considerable decline in response rates associated with its delayed initiation make clozapine an essential treatment option throughout the course of illness, beginning with the first psychotic episode. To maximize patients' benefits, systematic early recognition efforts based on stringent use of TRS criteria, a timely offer of clozapine, thorough side-effect screening and management as well as consistent use of therapeutic drug monitoring and established augmentation strategies for suboptimal responders are crucial. To minimize permanent all-cause discontinuation, re-challenges after neutropenia or myocarditis should be considered. Owing to clozapine's unique efficacy, comorbid conditions including substance use and most somatic disorders should not dissuade but rather encourage clinicians to consider clozapine. Moreover, treatment decisions need to be informed by the late onset of clozapine's full effects, which for reduced suicidality and mortality rates may not even be readily apparent. Overall, the singular extent of its efficacy combined with the high level of patient satisfaction continues to distinguish clozapine from all other available antipsychotics.
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Affiliation(s)
- Mishal Qubad
- Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital Frankfurt, Goethe University, Frankfurt am Main, Germany
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13
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Abstract
AIMS Clozapine is licensed for treatment-resistant psychosis and remains underutilised. This may berelated to the stringent haematological monitoring requirements that are mandatory in most countries. We aimed to compare guidelines internationally and develop a novel Stringency Index. We hypothesised that the most stringent countries would have increased healthcare costs and reduced prescription rates. METHOD We conducted a literature review and survey of guidelines internationally. Guideline identification involved a literature review and consultation with clinical academics. We focused on the haematological monitoring parameters, frequency and thresholds for discontinuation and rechallenge after suspected clozapine-induced neutropenia. In addition, indicators reflecting monitoring guideline stringency were scored and visualised using a choropleth map. We developed a Stringency Index with an international panel of clozapine experts, through a modified-Delphi-survey. The Stringency Index was compared to health expenditure per-capita and clozapine prescription per 100 000 persons. RESULTS One hundred twocountries were included, from Europe (n = 35), Asia (n = 24), Africa (n = 20), South America (n = 11), North America (n = 7) and Oceania and Australia (n = 5). Guidelines differed in frequency of haematological monitoring and discontinuation thresholds. Overall, 5% of included countries had explicit guidelines for clozapine-rechallenge and 40% explicitly prohibited clozapine-rechallenge. Furthermore, 7% of included countries had modified discontinuation thresholds for benign ethnic neutropenia. None of the guidelines specified how long haematological monitoring should continue. The most stringent guidelines were in Europe, and the least stringent were in Africa and South America. There was a positive association (r = 0.43, p < 0.001) between a country's Stringency Index and healthcare expenditure per capita. CONCLUSIONS Recommendations on how haematological function should be monitored in patients treated with clozapine vary considerably between countries. It would be useful to standardise guidelines on haematological monitoring worldwide.
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14
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Oloyede E, Whiskey E, Casetta C, Dzahini O, Dunnett D, Gandhi S, Gaughran F, Shergill S, McGuire P, MacCabe JH, Taylor D. Relaxation of the criteria for entry to the UK Clozapine Central Non-Rechallenge Database: a modelling study. Lancet Psychiatry 2022; 9:636-644. [PMID: 35772414 DOI: 10.1016/s2215-0366(22)00188-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/22/2022] [Accepted: 05/04/2022] [Indexed: 12/31/2022]
Abstract
BACKGROUND Clozapine is uniquely effective in treatment-resistant psychosis. In the UK, patients must discontinue clozapine indefinitely if they are placed on the Central Non-Rechallenge Database (CNRD) after their haematological parameters fall below particular thresholds. Under exceptional circumstances, patients can be rechallenged on clozapine under an off-licence agreement. In the USA in 2015, restrictive practice was discontinued to allow greater flexibility for clozapine maintenance. The absolute neutrophil count leading to treatment interruption was lowered from less than 1·5 × 109/L to less than 1·0 × 109/L and platelet and white cell count monitoring were ceased. We aimed to investigate the implications of a similar policy change on clozapine use in the UK. METHODS This was a modelling study of all patients registered on the UK CNRD. First, we determined the proportion of patients placed on the database in the UK who would have had to discontinue clozapine treatment under the US Food and Drug Administration (FDA) criteria. Second, we compared the haematological characteristics of patients who did or did not meet FDA criteria for discontinuing clozapine, including the time to registration from clozapine initiation and the proportion of cases of severe neutropenia at registration. Third, we investigated the success rates of clozapine re-challenge for patients that had been placed on the CNRD. Successful rechallenge was defined as no recurrence of CNRD registration. FINDINGS Between May 2, 2002 and March 1, 2021, 3731 patients were placed on the CNRD, with a mean age of 47 years (SD 15), including 1420 (38%) women and 2311 (62%) men, of whom 3089 (83%) were White, 360 (10%) were Black, 190 (5%) were Asian, and 92 (2%) were classified as other. 566 (15%) of 3731 patients met the equivalent criteria for clozapine discontinuation under the FDA guidelines. The median time to CNRD registration from clozapine initiation was 1·6 years (IQR 0·2-4·9). Data for 519 rechallenged patients were examined; 419 (81%) were successful. Clozapine rechallenge success rates were broadly similar between individuals who did not meet the US CNRD registration criteria (36 [78%] of 46) and those who did meet the criteria (383 [81%] of 473). INTERPRETATION Implementing the revised FDA monitoring criteria in the UK would substantially reduce clozapine discontinuation for haematological reasons, which would greatly improve the mental health outcomes of these patients without having a major effect on their physical health. FUNDING None.
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Affiliation(s)
- Ebenezer Oloyede
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK; Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.
| | - Eromona Whiskey
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK; National Psychosis Service, South London and Maudsley NHS Foundation Trust, London, UK; Institute of Pharmaceutical Science, King's College, London, UK
| | - Cecilia Casetta
- National Psychosis Service, South London and Maudsley NHS Foundation Trust, London, UK; Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Olubanke Dzahini
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK; Institute of Pharmaceutical Science, King's College, London, UK
| | - Danielle Dunnett
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Shreyans Gandhi
- Kings College Hospital London NHS Foundation Trust, London, UK
| | - Fiona Gaughran
- National Psychosis Service, South London and Maudsley NHS Foundation Trust, London, UK; Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK; NIHR Biomedical Research Centre for Mental Health South London and Maudsley NHS, London, UK
| | - Sukhi Shergill
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Philip McGuire
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - James H MacCabe
- National Psychosis Service, South London and Maudsley NHS Foundation Trust, London, UK; Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK; NIHR Biomedical Research Centre for Mental Health South London and Maudsley NHS, London, UK
| | - David Taylor
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK; Institute of Pharmaceutical Science, King's College, London, UK
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15
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Metropulos JT, Goldstein BR, Hodapp B. Recognition and Treatment Challenges of Acute Clozapine Withdrawal Syndrome: A Case Report. Cureus 2022; 14:e25765. [PMID: 35812573 PMCID: PMC9270087 DOI: 10.7759/cureus.25765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/08/2022] [Indexed: 11/14/2022] Open
Abstract
The limited psychiatric bedspace due to the COVID-19 pandemic and the lack of access to an up-to-date medication regimen delayed the recognition of the diagnosis and treatment for a 40-year-old man with schizoaffective disorder, bipolar type, who traveled from his home city and abruptly discontinued his prescription of clozapine. He developed a cholinergic rebound syndrome including delirium and extrapyramidal symptoms (EPS). The delay included time spent in two different medical hospitals: one awaiting psychiatric bedspace, and secondly, when the patient's cholinergic rebound syndrome was misdiagnosed as acute alcohol withdrawal. Once the etiology was recognized, he was promptly treated with anticholinergic medication (benztropine) and retitrated to his outpatient dose of clozapine leading to the resolution of symptoms including delirium and EPS. This case will discuss the challenges of continuity of care in delirious, psychotic, or otherwise confused patients, including contributions from the COVID-19 pandemic. A medication card or other improvements in medication databases that may reduce delays in treatment are discussed.
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16
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Monroy-Jaramillo N, Martínez-Magaña JJ, Pérez-Aldana BE, Ortega-Vázquez A, Montalvo-Ortiz J, López-López M. The role of alcohol intake in the pharmacogenetics of treatment with clozapine. Pharmacogenomics 2022; 23:371-392. [PMID: 35311547 DOI: 10.2217/pgs-2022-0006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Clozapine (CLZ) is an atypical antipsychotic reserved for patients with refractory psychosis, but it is associated with a significant risk of severe adverse reactions (ADRs) that are potentiated with the concomitant use of alcohol. Additionally, pharmacogenetic studies have explored the influence of several genetic variants in CYP450, receptors and transporters involved in the interindividual response to CLZ. Herein, we systematically review the current multiomics knowledge behind the interaction between CLZ and alcohol intake, and how its concomitant use might modulate the pharmacogenetics. CYP1A2*1F, *1C and other alleles not yet discovered could support a precision medicine approach for better therapeutic effects and fewer CLZ ADRs. CLZ monitoring systems should be amended and include alcohol intake to protect patients from severe CLZ ADRs.
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Affiliation(s)
- Nancy Monroy-Jaramillo
- Department of Genetics, National Institute of Neurology & Neurosurgery, Manuel Velasco Suárez, La Fama, Tlalpan, Mexico City, 14269, Mexico
| | - José Jaime Martínez-Magaña
- Department of Psychiatry, Division of Human Genetics, Yale University School of Medicine, Orange, West Haven, CT 06477, USA
| | - Blanca Estela Pérez-Aldana
- Doctorado en Ciencias Biológicas y de la Salud, Metropolitan Autonomous University, Campus Xochimilco, Villa Quietud, Coyoacán, Mexico City, 04960, Mexico
| | - Alberto Ortega-Vázquez
- Metropolitan Autonomous University, Campus Xochimilco, Villa Quietud, Coyoacán, Mexico City, 04960, Mexico
| | - Janitza Montalvo-Ortiz
- Department of Psychiatry, Division of Human Genetics, Yale University School of Medicine, Orange, West Haven, CT 06477, USA
| | - Marisol López-López
- Metropolitan Autonomous University, Campus Xochimilco, Villa Quietud, Coyoacán, Mexico City, 04960, Mexico
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17
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Oloyede E, Clark I, Mace S, Whiskey E, Taylor D. Clozapine augmentation with cariprazine for negative symptoms: a case series and literature review. Ther Adv Psychopharmacol 2022; 12:20451253211066642. [PMID: 35111297 PMCID: PMC8801710 DOI: 10.1177/20451253211066642] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Accepted: 11/25/2021] [Indexed: 12/16/2022] Open
Abstract
Only about 50% of patients with treatment-resistant schizophrenia respond to clozapine, and many more patients continue to experience ongoing and prominent negative symptoms. These negative symptoms, for which there are limited pharmacological options, may represent the greatest barrier to functional recovery. Cariprazine is a novel antipsychotic drug that is a partial agonist at dopamine D2 and D3 receptors with preferential binding to the D3 receptor, antagonism of 5HT2B receptors, and partial agonism at 5HT1A receptors. Cariprazine is currently licenced for the treatment of schizophrenia in Europe and the United States and has also been approved for bipolar disorder in the United States. There is a limited body of evidence to suggest clinical effectiveness as an augmentation strategy for negative symptoms in those treated with clozapine. In this case series, we present five cases of successful treatment of negative symptoms by clozapine combined with cariprazine in treatment-resistant psychosis.
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Affiliation(s)
- Ebenezer Oloyede
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK
| | - Ivana Clark
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK
| | - Shubhra Mace
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK
| | - Eromona Whiskey
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK
| | - David Taylor
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London SE5 8AZ, UK
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18
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Gee S, Almeida V, Hughes A, McMullen I, Taylor D. Reasons for admission to a general medical hospital for patients taking clozapine. Ther Adv Psychopharmacol 2022; 12:20451253221136753. [PMID: 36582490 PMCID: PMC9793060 DOI: 10.1177/20451253221136753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 10/12/2022] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Clozapine is associated with a diverse range of side effects. In addition, patients prescribed clozapine commonly suffer with medical comorbidities. OBJECTIVES This study aimed to characterise patients prescribed clozapine who required medical admission, understand reasons for admission, identify areas for interventions to prevent future admission and describe clozapine management during the inpatient stay. DESIGN We conducted a retrospective analysis of patients prescribed clozapine who were admitted to a general medical hospital in a 12-month period. METHOD Data were collected using electronic drug charts and notes. RESULTS In total, 114 clozapine patients were hospitalised. Twenty-eight patients (25%) were admitted because of infection, 12 (11%) were elective admissions and 12 (11%) had gastrointestinal problems. Most patients admitted were Black (54%) and half were female. Few changes were made to clozapine dosing on admission or during the inpatient stay. Most patients had been taking clozapine for many years at the point of admission, the majority were able to continue taking it for the duration of their medical treatment and were discharged on the same dose they were taking prior to admission. Clozapine plasma concentrations were not consistently measured with only 18 (16%) patients having one or more plasma concentrations determined during their admission. The median clozapine plasma concentration on admission was 0.48 mg/L (nor-clozapine 0.21 mg/L), with a range of 0.09 to 3.9 mg/L. Three patients were admitted to the intensive care unit during their admission; all were discharged on clozapine. Four patients died; one from lung adenocarcinoma, one bowel obstruction, one cardiac arrest and one chest sepsis. In total, 27 patients (23%) had their clozapine stopped on admission, 6 (22% of this group) unintentionally. CONCLUSIONS Our study found that the most common reason for admission for patients taking clozapine was infection. Plasma concentrations were not measured routinely despite clozapine having a narrow therapeutic index and enhanced potential for toxicity in the medically unwell patient.
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Affiliation(s)
- Siobhan Gee
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK.,Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - Vasco Almeida
- Department of Psychological Medicine, King's College Hospital, London, UK
| | - Adam Hughes
- Department of Psychological Medicine, King's College Hospital, London, UK
| | - Isabel McMullen
- Department of Psychological Medicine, King's College Hospital, London, UK
| | - David Taylor
- Pharmacy Department, South London and Maudsley NHS Foundation Trust, London, UK.,Faculty of Life Sciences & Medicine, King's College London, London, UK
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19
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Blackman G, Oloyede E, Horowitz M, Harland R, Taylor D, MacCabe J, McGuire P. Reducing the Risk of Withdrawal Symptoms and Relapse Following Clozapine Discontinuation-Is It Feasible to Develop Evidence-Based Guidelines? Schizophr Bull 2021; 48:176-189. [PMID: 34651184 PMCID: PMC8781383 DOI: 10.1093/schbul/sbab103] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Clozapine is the only antipsychotic that is effective in treatment-resistant schizophrenia. However, in certain clinical situations, such as the emergence of serious adverse effects, it is necessary to discontinue clozapine. Stopping clozapine treatment poses a particular challenge due to the risk of psychotic relapse, as well as the development of withdrawal symptoms. Despite these challenges for the clinician, there is currently no formal guidance on how to safely to discontinue clozapine. We assessed the feasibility of developing evidence-based recommendations for (1) minimizing the risk of withdrawal symptoms, (2) managing withdrawal phenomena, and (3) commencing alternatives treatment when clozapine is discontinued. We then evaluated the recommendations against the Appraisal of Guidelines for Research and Evaluation (AGREE) II criteria. We produced 19 recommendations. The majority of these recommendation were evidence-based, although the strength of some recommendations was limited by a reliance of studies of medium to low quality. We discuss next steps in the refinement and validation of an evidence-based guideline for stopping clozapine and identify key outstanding questions.
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Affiliation(s)
- Graham Blackman
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK,Psychosis Clinical Academic Group, South London and Maudsley NHS Foundation Trust, London, UK,To whom correspondence should be addressed; Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK; tel: 44-20-7848-5228, fax: 44-20-7848-0976, e-mail:
| | - Ebenezer Oloyede
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK,Psychosis Clinical Academic Group, South London and Maudsley NHS Foundation Trust, London, UK,Institute of Pharmaceutical Science, King’s College London, London, UK
| | - Mark Horowitz
- Division of Psychiatry, University College London, London, UK,North East London NHS Foundation Trust, London, UK
| | - Robert Harland
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK,Psychosis Clinical Academic Group, South London and Maudsley NHS Foundation Trust, London, UK
| | - David Taylor
- Institute of Pharmaceutical Science, King’s College London, London, UK
| | - James MacCabe
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK,Psychosis Clinical Academic Group, South London and Maudsley NHS Foundation Trust, London, UK
| | - Philip McGuire
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK,Psychosis Clinical Academic Group, South London and Maudsley NHS Foundation Trust, London, UK
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