Medicinal Plants and Natural Antioxidants Effective Against Corona: A Systematic Review

Abstract

Background:: Coronavirus disease 2019 or COVID-19 is a type of acute respiratory syndrome caused by a virus from the family of coronaviruses that has affected all the countries of the world in a short period. Objective:: The purpose of this review is to identify and report medicinal plants effective against covid-19. In this study, the keywords containing medicinal plants and "corona disease" i.e. covid-19, MERS, SARS-CoV-2, and medicinal plants or natural antioxidants were used. Methodology:: Search databases including ISI, Scopus, Science Direct, Google Scholar, Mag Iran, and SID were used. Relevant articles were selected and unrelated articles were excluded. Results:: Based on the obtained results, medicinal plants such as Isatis indigotica Fortune, Bupleurum spp., Curcuma longa L., Cibotium barometz (L.), Rheum palmatum L., Rheum palmatum L., Sprag, Scutettaria baicalensis Georg, Alnus japonica (Thunb.) Steud, Camellia sinensis (L.) Kuntze, Salvia miltiorrhiza Bunge, Paulownia tomentosa (Thunb.) Steud. Salvia miltiorrhiza Bunge, Tribulus terrestris L, Broussonetia papyrifera (L.) Vent., Stephania tetrandra S. Moore and related species, Sambucus formosana Nakai, Strobilanthes cusia, Lycoris radiata, E. purpurea, Lobelia inflata, Eupatorium perfoliatum, and Achyranthes aspera are the most important medicinal plants that are used in the treatment of Covid-19. Conclusion:: Due to having secondary metabolites and antioxidant activity, medicinal plants have a favorable effect in improving corona symptoms in patients with covid-19.