Effects of Licorice on clinical symptoms and laboratory signs in moderately ill patients with pneumonia from COVID-19: A

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Effects of Licorice on clinical symptoms and laboratory signs in moderately ill patients with pneumonia from COVID-19: A structured summary of a study protocol for a randomized controlled trial Omid Safa1, Mehdi Hassani-Azad2, Mehdi Farashahinejad2, Parivash Davoodian2, Habib Dadvand2, Soheil Hassanipour3 and Mohammad Fathalipour4,5*

Abstract Objectives: We investigate the effects of Licorice (Glycyrrhiza glabra L.) root extract, an anti-inflammatory natural medicine, compared to the usual therapeutic regimen on clinical symptoms and laboratory signs in patients with confirmed COVID-19 that are moderately ill. Trial design: This is a single-center, open-label, randomized, clinical trial with parallel-group design. This study is being conducted at Shahid Mohammadi Hospital, Bandar Abbas, Iran. Participants: Both male and female patients with ≥18 years of age (≥ 35 kg of weight), admitted at the Shahid Mohammadi Hospital, Hormozgan University of Medical Sciences, Bandar Abbas for treatment, screened for the following criteria. Inclusion criteria: 1. Confirmed diagnosis of SARS-CoV-2 infection (via polymerase chain reaction [PCR] and/or antibody test). 2. Presenting as moderate COVID-19 pneumonia (via chest computed tomography (CT) and/or X-ray) requiring hospitalization. 3. Hospitalized ≤48 hours. 4. Signing informed consent and willingness of study participant to accept randomization to any assigned treatment arm. Exclusion criteria: 1. Underlying diseases, including chronic heart disease, chronic hypertension, severe renal failure, severe liver failure, and thyroid disorders. (Continued on next page)

* Correspondence: [email protected]; [email protected] 4 Department of Pharmacology and Toxicology, Faculty of Pharmacy, Hormozgan University of Medical Sciences, Bandar Abbas, Iran 5 Endocrinology and Metabolic Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran Full list of author information is available at the end of the article © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwi