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Yang J, Guo J, Yang X, Chen J, Bai T, Liu S. Nocebo effects and influencing factors in the randomized clinical trials of chronic constipation: A systematic review and meta-analysis. Neurogastroenterol Motil 2024; 36:e14708. [PMID: 37936549 DOI: 10.1111/nmo.14708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 09/22/2023] [Accepted: 10/26/2023] [Indexed: 11/09/2023]
Abstract
BACKGROUND Nocebo effects are unavoidable in randomized clinical trials. We aimed to assess the magnitude of nocebo effects and explore the influencing factors in chronic constipation. METHODS We searched the PubMed, Embase, and Cochrane Library databases up to July 2022. Randomized, placebo-controlled trials investigating interventions in chronic constipation were included. We conducted a random effects meta-analysis of the proportion of adverse events (AEs) in placebo-treated participants and evaluated the effect of trial characteristics on nocebo effects. KEY RESULTS We identified 20,204 studies from the databases, of which 61 were included in the final analysis. The pooled placebo AE rate was 30.41%, and AE-related withdrawal rate was 1.53%. The most commonly reported AEs were headache (5.67%), diarrhea (4.45%), abdominal pain (3.98%), nasopharyngitis (3.39%), nausea (3.36%), and flatulence (2.95%). The placebo AE rate was lower in trials conducted in Asia compared to those in Europe, North America, and international trials. It was also lower in trials diagnosed by Rome III compared to clinician's opinion and Rome II. Additionally, the placebo AE rate was lower in single-center trials compared to multicenter trials, lower in 5-8 weeks therapy compared to 9-12 weeks therapy, lower in participants with FC compared to those with IBS-C and CC, lower in trials with 2 arms compared to 3 arms, and higher in trials with prokinetic drugs compared to secretagogues and laxatives. CONCLUSIONS & INFERENCES The placebo AE rate was 30.41% in patients with chronic constipation. Based on our findings, we recommend that researchers take the nocebo effects into consideration when designing and conducting clinical trials and adopt specific measures to mitigate the negative influence of nocebo effects.
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Affiliation(s)
- Jingze Yang
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jinlu Guo
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xin Yang
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jie Chen
- Department of Pathology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tao Bai
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shi Liu
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Zhang Y, Huang W, Shan Z, Zhou Y, Qiu T, Hu L, Yang L, Wang Y, Xiao Z. A new experimental rat model of nocebo-related nausea involving double mechanisms of observational learning and conditioning. CNS Neurosci Ther 2024; 30:e14389. [PMID: 37545429 PMCID: PMC10848046 DOI: 10.1111/cns.14389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/12/2023] [Accepted: 07/23/2023] [Indexed: 08/08/2023] Open
Abstract
AIM The nocebo effect, such as nausea and vomiting, is one of the major reasons patients discontinue therapy. The underlying mechanisms remain unknown due to a lack of reliable experimental models. The goal of this study was to develop a new animal model of nocebo-related nausea by combining observational learning and Pavlovian conditioning paradigms. METHODS Male Sprague-Dawley rats with nitroglycerin-induced migraine were given 0.9% saline (a placebo) or LiCl (a nausea inducer) following headache relief, according to different paradigms. RESULTS Both strategies provoked nocebo nausea responses, with the conditioning paradigm having a greater induction impact. The superposition of two mechanisms led to a further increase in nausea responses. A preliminary investigation of the underlying mechanism revealed clearly raised peripheral and central cholecystokinin (CCK) levels, as well as specific changes in the 5-hydroxytryptamine and cannabinoid systems. Brain networks related to emotion, cognition, and visceral sense expressed higher c-Fos-positive neurons, including the anterior cingulate cortex (ACC), insula, basolateral amygdala (BLA), thalamic paraventricular nucleus (PVT), hypothalamic paraventricular nucleus (PVN), nucleus tractus solitarius (NTS), periaqueductal gray (PAG), and dorsal raphe nucleus-dorsal part (DRD). We also found that nausea expectances in the model could last for at least 12 days. CONCLUSION The present study provides a useful experimental model of nocebo nausea that might be used to develop potential molecular pathways and therapeutic strategies for nocebo.
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Affiliation(s)
- Yu Zhang
- Department of NeurologyRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
- Central LaboratoryRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
| | - Wanbin Huang
- Department of NeurologyRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
- Central LaboratoryRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
| | - Zhengming Shan
- Department of NeurologyRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
- Central LaboratoryRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
| | - Yanjie Zhou
- Department of NeurologyRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
- Central LaboratoryRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
| | - Tao Qiu
- Department of NeurologyRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
| | - Luyu Hu
- Department of NeurologyRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
| | - Liu Yang
- Department of NeurologyRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
| | - Yue Wang
- Department of NeurologyRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
| | - Zheman Xiao
- Department of NeurologyRenmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina
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Basedau H, Ornello R, Matteis ED, Davaasuren B, Kadyrova B, Vuralli D, Bozhenko M, Azizova I, Bitsadze N, Eralieva E, Ashina M, Mitsikostas D, Puledda F. Placebo and nocebo in the treatment of migraine: How much does real world effectiveness depend on contextual effects? Cephalalgia 2023; 43:3331024231218392. [PMID: 38041833 DOI: 10.1177/03331024231218392] [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] [Indexed: 12/04/2023]
Abstract
PURPOSE Treatments in medicine impact individuals beyond their intended effects, due to phenomena such as the placebo and nocebo effects. The placebo effect arises from the positive expectation of a treatment being beneficial, while the nocebo effect stems from the negative expectation of a treatment causing harm. Both in real-world practice and clinical trials, treatments can lead to outcomes unrelated to their intended mechanism of action, which we categorize as placebo and nocebo responses. These responses, combined with the inherent fluctuation in a condition's natural progression, regression to the mean, and random comorbidities, make up a significant part of the therapeutic experience. Particularly in pain management, placebo and nocebo effects play a substantial role. By addressing modifiable contextual factors such as patient expectations, lifestyle choices, and the therapeutic relationship, healthcare providers can enhance the effectiveness of migraine treatments, paving the way for a more comprehensive, individualized approach to patient care. We must also consider non-modifiable factors like personal experiences, beliefs, and information from social media and the internet. CONCLUSION This review offers a summary of our current understanding of the placebo and nocebo effects in migraine management.
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Affiliation(s)
- Hauke Basedau
- Department of Systems Neuroscience, University Medical Center Hamburg- Eppendorf, Hamburg, Germany
| | - Raffaele Ornello
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Eleonora De Matteis
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | | | - Begimai Kadyrova
- Department of Special Clinical Disciplines, International School of Medicine of International University of Kyrgyzstan, Bishkek, Kyrgyzstan
| | - Doga Vuralli
- Department of Neurology and Algology, Neuropsychiatry Center, Neuroscience and Neurotechnology Center of Excellence (NÖROM), Gazi University, Ankara, Turkey
| | - Myroslav Bozhenko
- Department of Neurology, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Ilaha Azizova
- Neurological Clinic "New Medical Technologies", Baku, Azerbaijan
| | | | | | - Messoud Ashina
- Danish Headache Center, Department of Neurology, Rigshospitalet-Glostrup, University of Copenhagen, Copenhagen, Denmark
| | - Dimos Mitsikostas
- Department of Neurology Α, Aegintion Hospital, National and Kapidistrian University of Athens, Athens, Greece
| | - Francesca Puledda
- Headache Group, Wolfson SPaRC, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
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[Consensus statement of the migraine and headache societies (DMKG, ÖKSG, and SKG) on the duration of pharmacological migraine prophylaxis]. Schmerz 2023; 37:5-16. [PMID: 36287263 PMCID: PMC9607711 DOI: 10.1007/s00482-022-00671-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 08/19/2022] [Accepted: 08/23/2022] [Indexed: 02/03/2023]
Abstract
Migraine is the most common neurological disorder and can be associated with a high degree of disability. In addition to non-pharmacological approaches to reduce migraine frequency, pharmacological migraine preventatives are available. Evidence-based guidelines from the German Migraine and Headache Society (DMKG), and German Society for Neurology (DGN), Austrian Headache Society (ÖKSG), and Swiss Headache Society (SKG) are available for indication and application. For therapy-relevant questions such as the duration of a pharmacological migraine prevention, no conclusions can be drawn from currently available study data. The aim of this review is to present a therapy consensus statement that integrates the current data situation and, where data are lacking, expert opinions. The resulting current recommendations on the duration of therapy for pharmacological migraine prophylaxis are shown here.
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Goßrau G, Förderreuther S, Ruscheweyh R, Ruschil V, Sprenger T, Lewis D, Kamm K, Freilinger T, Neeb L, Malzacher V, Meier U, Gehring K, Kraya T, Dresler T, Schankin CJ, Gantenbein AR, Brössner G, Zebenholzer K, Diener HC, Gaul C, Jürgens TP. [Consensus statement of the migraine and headache societies (DMKG, ÖKSG, and SKG) on the duration of pharmacological migraine prophylaxis]. DER NERVENARZT 2022; 94:306-317. [PMID: 36287216 PMCID: PMC9607745 DOI: 10.1007/s00115-022-01403-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 08/23/2022] [Indexed: 11/07/2022]
Abstract
Migraine is the most common neurological disorder and can be associated with a high degree of disability. In addition to non-pharmacological approaches to reduce migraine frequency, pharmacological migraine preventatives are available. Evidence-based guidelines from the German Migraine and Headache Society (DMKG), and German Society for Neurology (DGN), Austrian Headache Society (ÖKSG), and Swiss Headache Society (SKG) are available for indication and application. For therapy-relevant questions such as the duration of a pharmacological migraine prevention, no conclusions can be drawn from currently available study data. The aim of this review is to present a therapy consensus statement that integrates the current data situation and, where data are lacking, expert opinions. The resulting current recommendations on the duration of therapy for pharmacological migraine prophylaxis are shown here.
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Affiliation(s)
- Gudrun Goßrau
- Kopfschmerzambulanz, Universitätsschmerzcentrum, Medizinische Fakultät der TU Dresden, Universitätsklinikum Dresden, Fetscherstr. 74, 01307 Dresden, Deutschland
| | - Stefanie Förderreuther
- Neurologische Klinik und Poliklinik, Ludwig-Maximilians-Universität München, München, Deutschland
| | - Ruth Ruscheweyh
- Neurologische Klinik und Poliklinik, Ludwig-Maximilians-Universität München, München, Deutschland ,Deutsche Migräne- und Kopfschmerzgesellschaft, Frankfurt, Deutschland ,Klinik für Psychosomatik und Psychotherapie, Technische Universität München, München, Deutschland
| | - Victoria Ruschil
- Abteilung Neurologie mit Schwerpunkt Epileptologie, Universitätsklinikum Tübingen, Tübingen, Deutschland
| | - Till Sprenger
- Deutsche Klinik für Diagnostik, DKD Helios Klinik Wiesbaden, Wiesbaden, Deutschland
| | | | - Katharina Kamm
- Neurologische Klinik und Poliklinik, Ludwig-Maximilians-Universität München, München, Deutschland
| | | | - Lars Neeb
- Helios Global Health, Berlin, Deutschland ,Neurologische Klinik und Poliklinik, Institut für Public Health, Charité-Universitätsmedizin Berlin, Freie Universität Berlin und Humboldt Universität zu Berlin, Berlin, Deutschland
| | | | - Uwe Meier
- Berufsverband Deutscher Neurologen, Wulffstr. 8, 12165 Berlin, Deutschland
| | - Klaus Gehring
- Berufsverband Deutscher Nervenärzte, Wulffstr. 8, 12165 Berlin, Deutschland
| | - Torsten Kraya
- Neurologische Klinik, Krankenhaus Sankt Georg Leipzig, Leipzig, Deutschland ,Neurologische Klinik, Universitätsklinikum Halle-Saale, Halle-Saale, Deutschland
| | - Thomas Dresler
- Klinik für Psychiatrie und Psychotherapie, Tübingen Zentrum für seelische Gesundheit, Universitätsklinikum Tübingen, Tübingen, Deutschland ,LEAD Graduiertenschule & Forschungsnetzwerk, Tübingen, Tübingen, Deutschland
| | - Christoph J. Schankin
- Neurologische Klinik, Inselspital, Universitätsspital Bern, Universität Bern, Bern, Schweiz ,Universitätsspital Bern, Universität Bern, Bern, Schweiz
| | - Andreas R. Gantenbein
- Neurologie & Schmerz, ZURZACH Care, Bad Zurzach, Schweiz ,Praxis Neurologie am Untertor, Bülach, Schweiz
| | - Gregor Brössner
- Universitätsklinik für Neurologie, Medizinische Universität Innsbruck, Innsbruck, Österreich
| | - Karin Zebenholzer
- Universitätsklinik für Neurologie, Medizinische Universität Wien, Wien, Österreich
| | - Hans-Christoph Diener
- Institut für Medizinische Informatik, Biometrie und Epidemiologie (IMIBE), Medizinische Fakultät, Universität Duisburg-Essen, Essen, Deutschland
| | - Charly Gaul
- Kopfschmerzzentrum Frankfurt, Frankfurt, Deutschland
| | - Tim P. Jürgens
- Kopfschmerzzentrum Nordost, Neurologische Klinik und Poliklinik, Universitätsklinik Rostock, Rostock, Deutschland ,Neurologische Klinik, KMG Krankenhaus Güstrow, Güstrow, Deutschland
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