Current State of Research About Chinese Herbal Medicines (CHM) for the Treatment of Coronavirus Disease 2019 (COVID-19): a Scoping Review

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Current State of Research About Chinese Herbal Medicines (CHM) for the Treatment of Coronavirus Disease 2019 (COVID-19): a Scoping Review Zurich Open Repository and Archive University of Zurich Main Library Strickhofstrasse 39 CH-8057 Zurich www.zora.uzh.ch Year: 2020 Current state of research about Chinese Herbal Medicines (CHM) for the treatment of Coronavirus Disease 2019 (COVID-19): A scoping review López-Alcalde, Jesús ; Yan, Yuqian ; Witt, Claudia M ; Barth, Jürgen Abstract: Background: There is currently no effective treatment against coronavirus disease 2019 (COVID- 19). The optimal selection of interventions targeting the virus is unknown. Therefore, evidence from randomized controlled trials (RCTs) to support specific treatment against COVID-19 is urgently needed. The use of Chinese herbal medicines (CHMs) might have a role in the treatment and symptomatic man- agement of patients with COVID-19. It was aimed at providing an overview of the available evidence and ongoing trials concerning the effects of CHMs for the treatment of COVID-19. Methods: This isa narrative review of relevant studies. Searches were conducted to identify documents published till April 22, 2020. Electronic databases, evidence-based collections, websites of relevant organizations, and trial registries were consulted. Results: A total of 25 guidelines on the treatment of patients with COVID-19 were identified. Four guidelines provided recommendations on the use of CHMs; these guidelines werede- veloped in China and South Korea and were based on the consensus of experts exclusively. The remaining 21 guidelines provided no guidance on CHMs. No finished RCTs of CHMs for the treatment of patients with COVID-19 was found. According to the evidence evaluated in this review, a Cochrane review of CHMs for severe acute respiratory syndrome and five uncontrolled observational studies of the effects of CHMs in patients with COVID-19, the effects of CHMs for COVID-19 are unknown. A total of52 ongoing clinical trials of CHM interventions for the treatment of COVID-19 were found. These trials will be carried out mostly in China (n = 51). Forty (77%) of the ongoing trials will be randomized, whereas 12 (23%) have an unclear sequence generation procedure. Forty-seven trials (90%) will have a sample size <400 participants. Conclusions: To the authors’ knowledge, only the Chinese and the South Korean guidelines recommend CHMs as a treatment option for patients with COVID-19. These guidelines base their recommendations on the consensus of experts. Clinical guidelines or health authorities from other countries do not provide advice on CHMs. Due to the absence of RCT, there is currently no reliable evidence on the effects of any specific CHM intervention for the treatment of patients with COVID-19. A high number of clinical trials of different herbal products are being currently conducted in China. DOI: https://doi.org/10.1089/acm.2020.0189 Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-198914 Journal Article Published Version The following work is licensed under a Creative Commons: Attribution 4.0 International (CC BY 4.0) License. Originally published at: López-Alcalde, Jesús; Yan, Yuqian; Witt, Claudia M; Barth, Jürgen (2020). Current state of research about Chinese Herbal Medicines (CHM) for the treatment of Coronavirus Disease 2019 (COVID-19): A scoping review. Journal of Alternative and Complementary Medicine, 26(7):557-570. DOI: https://doi.org/10.1089/acm.2020.0189 2 THE JOURNAL OF ALTERNATIVE AND COMPLEMENTARY MEDICINE Volume 26, Number 7, 2020, pp. 557–570 ª Mary Ann Liebert, Inc. DOI: 10.1089/acm.2020.0189 JACM REVIEWS Current State of Research About Chinese Herbal Medicines (CHM) for the Treatment of Coronavirus Disease 2019 (COVID-19): A Scoping Review Jesu´sLo´pez-Alcalde, MD,1–4 Yuqian Yan, MD,1 Claudia M. Witt, MD,1,5,6 and Ju¨rgen Barth, PhD1 Abstract Background: There is currently no effective treatment against coronavirus disease 2019 (COVID-19). The optimal selection of interventions targeting the virus is unknown. Therefore, evidence from randomized con- trolled trials (RCTs) to support specific treatment against COVID-19 is urgently needed. The use of Chinese herbal medicines (CHMs) might have a role in the treatment and symptomatic management of patients with COVID-19. It was aimed at providing an overview of the available evidence and ongoing trials concerning the effects of CHMs for the treatment of COVID-19. Methods: This is a narrative review of relevant studies. Searches were conducted to identify documents published till April 22, 2020. Electronic databases, evidence-based collections, websites of relevant organi- zations, and trial registries were consulted. Results: A total of 25 guidelines on the treatment of patients with COVID-19 were identified. Four guidelines provided recommendations on the use of CHMs; these guidelines were developed in China and South Korea and were based on the consensus of experts exclusively. The remaining 21 guidelines provided no guidance on CHMs. No finished RCTs of CHMs for the treatment of patients with COVID-19 was found. According to the evidence evaluated in this review, a Cochrane review of CHMs for severe acute respiratory syndrome and five uncontrolled observational studies of the effects of CHMs in patients with COVID-19, the effects of CHMs for COVID-19 are unknown. A total of 52 ongoing clinical trials of CHM interventions for the treatment of COVID-19 were found. These trials will be carried out mostly in China (n = 51). Forty (77%) of the ongoing trials will be randomized, whereas 12 (23%) have an unclear sequence generation procedure. Forty-seven trials < Downloaded by ETH-Bibliothek from www.liebertpub.com at 02/03/21. For personal use only. (90%) will have a sample size 400 participants. Conclusions: To the authors’ knowledge, only the Chinese and the South Korean guidelines recommend CHMs as a treatment option for patients with COVID-19. These guidelines base their recommendations on the consensus of experts. Clinical guidelines or health authorities from other countries do not provide advice on CHMs. Due to the absence of RCT, there is currently no reliable evidence on the effects of any specific CHM intervention for the treatment of patients with COVID-19. A high number of clinical trials of different herbal products are being currently conducted in China. Keywords: COVID-19, complementary, alternative and integrative medicine, Traditional Chinese Medicine, Chinese herbal medicine, narrative review 1Institute for Complementary and Integrative Medicine, University Hospital Zurich and University Zurich, Zurich, Switzerland. 2Faculty of Health Sciences, Universidad Francisco de Vitoria (UFV), Madrid, Spain. 3Instituto Ramo´n y Cajal de Investigacio´n Sanitaria (IRYCIS), Unidad de bioestadı´stica clı´nica, Hospital Universitario Ramo´n y Cajal, Madrid, Spain. 4The Biomedical Research Center Network for Epidemiology and Public Health (CIBERESP), Madrid, Spain. 5Institute for Social Medicine, Epidemiology and Health Economics, Charite´–Universita¨tsmedizin Berlin, Berlin, Germany. 6Center for Integrative Medicine, University of Maryland School of Medicine, Baltimore, MD, USA. 557 558 LO´ PEZ-ALCALDE ET AL. Introduction Inclusion and exclusion criteria Type of study designs. The focus of this review was to oronavirus disease 2019 (COVID-19) is an acute re- identify rigorous secondary research and RCTs on this re- spiratory disease caused by severe acute respiratory C view topic. Thus, we looked for evidence-based clinical syndrome coronavirus-2 (SARS-CoV-2). COVID-19 has guidelines, health technology assessments, systematic re- rapidly spread globally since an outbreak first reported in views, and RCTs. If there was no secondary research or Wuhan in December 2019. As declared by the World Health RCTs available, nonrandomized trials were looked for, that Organization (WHO) on March 11, COVID-19 is a ‘‘public is, quasi-randomized controlled trials (quasi-RCTs) and health emergency of international concern,’’ and the pan- nonrandomized clinical trials. Only if previous designs were demic is overloading health care facilities worldwide. not found, observational studies, narrative reviews, and There is currently no effective treatment against COVID- opinion of experts were included. Since it was expected that 19. The optimal selection of antiviral agents and interven- the evidence base would be scarce or absent, systematic tions targeting the virus is unknown. Therefore, high-quality reviews on the effects of CHMs in patients with SARS were evidence from randomized controlled trials (RCTs) to sup- also included. port decisions concerning the treatment of COVID-19 is urgently needed. Traditional Chinese Medicine (TCM) is an essential part of Types of participants. Patients with COVID-19 (the di- the health care system in China.1,2 The WHO recognizes this agnosis as provided by the study authors was accepted). situation and supports the Member States of the Western Pacific A specific set of diagnostic criteria was not required as these Region to integrate traditional medicine into their national health have changed since the beginning of the outbreak. systems.3 In this line, the WHO International Classification of Diseases (ICD 11) has introduced a new chapter on traditional 4 Types of interventions. Studies evaluating the use of medicine. TCMisalsousedinWesterncountriesandisrec- 5–7 CHMs (combined or not with conventional medicines) for ognized as a complementary or alternative medicine. the treatment of patients with COVID-19 were included. To Chinese herbal medicines (CHMs)
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