Acta Scientific Pharmaceutical Sciences (ASPS)(ISSN: 2581-5423)

Review Article Volume 5 Issue 8

Potential Non-toxic Indian Medicinal Plants may Use as a Traditional Medicine to Treat Covid-19 and Opportunistic Fungal Infections

King Solomon Ebenezer*, Tamilselvan Chidambaram, Rekha Manivanan, Venkatadri Babu, Abarna Punniyamoorthy and Mangaiyarkarasi Palanisamy

Bioscience Research Foundation, Chennai, Tamilnadu, India

*Corresponding Author: King Solomon Ebenezer, Bioscience Research Foundation, Chennai, Tamilnadu, India. E-mail:

Received: June 28, 2021; Published: July 26, 2021


  The severe acute respiratory syndrome (SARS) Coronavirus virus (SARS CoV2) pandemic, which originated in Wuhan, China and spread to all countries, has had a huge impact on the global human population. As a result of environmental conditions and human immunity-based infection, virus strains have recently changed and formed a virulent new strain that affects people. Scientists are having difficulty controlling the changed virulence strain in terms of vaccine production. In ancient times, medicinal plant extracts were used directly for sickness suppression and eradication. As a result, this mode is appropriate for eradicating coronavirus from the human body. India is the wealthiest country in the world, particularly in terms of medicinal plants. Some medicinal plants have great potential secondary metabolites for combating viral and fungal diseases while also being nontoxic. With a high rate of success, therapeutic plant items have recently become popular in the fight against the threatening COVID-19 disease. Under these circumstances, finding a medicine for a lethal disease is vital in order to lower death rates and save human lives. Gymnema sylvestre has shown promising action against viruses and fungi, therefore it may be examined further in the drug development process.

Keywords: Coronavirus; LD50; Non-toxic; Medicinal Plant; Viral Infections; Immunity; Mucormycosis


  In the early 1960s, two strains of a novel virus, 229E and OC43, were discovered in the respiratory tracts of people who had a common cold. Both strains had pleomorphic, membrane-coated, and club-shaped surface projections, despite being found by different scientists. These viruses, along with other animal viruses with similar appearance, were later grouped into a new genus and designated coronavirus in the late 1960s. This group of viruses has infected mammals and birds throughout history, including rats, mice, dogs, cats, turkeys, calves, rabbits, and pigs. Coronavirus infection in humans occurred at any age and most common in children causing a variety of respiratory illness including mild upper respiratory tract infection, common cold and often asthma and chronic bronchitis. Previously in the year 2002-2003, a severe acute respiratory syndrome caused by a novel coronavirus lead to an epidemic disease and later termed as SARS coronavirus. In the following years, new strains of coronavirus NL63, NH and HKU1 were discovered associated with respiratory illness coronavirus. In 2012, another novel coronavirus caused epidemic disease in Middle East and Europe and the disease termed as MERS coronavirus. Both the SARS and MERS coronavirus thought to be spread from animals, the former from Himalayan civets and the latter from camels [1].

  The present coronavirus infection emerged in 2019 in China presumed to be transmitted from bat has spread to all the countries around the globe and declared as a pandemic disease. The genome of the novel coronavirus is mostly similar to the SARS coronavirus and hence termed as SARS CoV2 and the disease was named as COVID-19 by World Health Organization [2]. Since last year, in India and other countries the 1st wave, 2nd wave of SARS coronavirus 2 infection continuing in the human population and 3rd wave to be expected on forth coming days. The infection rate and mortality rate had been alarmingly increasing all over the world. In order to reduce the spreading of infection and death rate, all around the world each country has taken measures such as lockdown, restrictions of public affairs, closing the international borders, etc. In other point of view world economic was also affected. Even though these measures in effect the virus is still spreading and has become more virulent than that of when it was emerged.

  The scientists from Centre for Cellular and Molecular Biology of the Council of Scientific and Industrial Research (CSIR-CCMB, Hyderabad, India) identified genetically unique cluster ‘Clade A3i and A2a’ of novel coronavirus in India. At the time of outbreak in February 2020 the Clade A3i identified, which comprises of 41% of all SARS-CoV2 genomes from Indian samples, and 3.5% of global genomes. Now A2a is emerging predominant coronavirus clade in India out of the 213 genomes analyzed showed 62% were A2a and 41% of the A3i clade. So day by day the emergence and virulence activity of the mutant Covid 19 virus is giving danger to humans and trouble to scientist.

  Previous research has identified 22 traditional medicinal plants with potential antiviral action [3]. According to a similar report, antiviral, anti-inflammatory, and immuno-modulatory actions of AYUSH herbal formulations may help to lessen the severity of the disease [4]. This review examines the effects of Indian traditional medicinal plants on viral and opportunistic fungal infections, as well as their acute toxicological effects.

SARS COV-2 virus infection: A better understanding

  Coronavirus is a positive sense single strand RNA virus and it is composed of lipid bilayer envelope proteins. The SARS COV-2 virus enters in to human through the attachment of envelope spike protein (S protein) with a human membrane receptor (ACE2). After binding the RNA genome of virus 5’methylated and 3’ polyadenylated tail acts as a mRNA and gets translated with the human ribosomes.

  During translation, RNA dependent RNA polymerase, RNA helicase, and Exoribonuclaease each produce proteins involved in replication, transcription and recombination process. The progeny virus with positive sense RNA assembles and released from the host through exocytosis and infects other cells [5].

Preventive actions

  The coronavirus prevention approach is limiting the spread of cases. It's logically straightforward, and everyone knows to wash their hands frequently with soap or disinfectants. Maintaining a strict social distance from the individual, Covering nose and mouth with a mask helps prevent the exposure to virus. When confronted with unavoidable situations, the person should stop touching eyes, nose, or mouth with your hands. Cover your nose and mouth with your bent elbow while coughing. Stay at home and self-quarantine instead of travelling. If the preventive measures strictly adhered, the virus will not spread to another and can save the human lives [6] (Figure 1).

Figure 1: Preventive measure to control Covid-19.

Indian medicinal plants

  India has the richest source and leading in the medicinal plants wise compared to other countries. In this regard, there are an estimated 40,000 plant species, each with its own flora, and different medicinal plant species which are distributed across many diverse geographical and climatic zones. Those species were widely used in traditional Indian medical systems [7]. The lack of a specialized medicine to treat the mutant COVID-19 disease will result in a high mortality rate, particularly among those with weakened immune systems. Many research institutes and scientists are still working on developing a new vaccination or immune-related medicine to combat altered strains. The utilization of secondary metabolites from plants used in the development of poly herbal medicine to treat viral diseases may help to control coronavirus infection in humans [8]. Medicinal plants are the backbone of Indian traditional medicine system and have a long history of usage in India especially in Tamilnadu as ‘Sidda Maruthuvam'. A recent scientific improvement has been helpful for scientists in establishing and proving the efficacy of the medicinal plants with the respective therapeutic use to the community. In this regard, table 1 enlists the proven potential medicinal plants with activity against life threatening viral diseases, the medicinal plants with efficacy to treat the common symptoms exhibited in any viral diseases such as fever cough asthma and also the medicinal plants that can modulate the immune system and boosts up the body defense system against pathogen attack. The table also provides the acute toxicity data of those medicinal plants in terms of LD50. Acute toxicity is the first test conducted for the safety assessment for any chemical including pharmaceuticals before human consumption. The test utilizes animal model to administrate through oral, dermal or inhalation route followed by absorption and distribution throughout the body that elicits any systemic toxicity if present [9]. The mentioned medicinal plants have proven to be well tolerated systematically as the LD50 values were above the regulatory limits and are safe for human consumption. Development of a potential drug from the medicinal plant thus can prove useful in the long run of Coronavirus battle.

Medicinal Plants

Medicinal Use


LD50 (mg/kg b.wt)


Pergularia daemia





Gymnema sylvestre





Ocimum sanctum





Annona reticulata





Bauhinia purpuria





Momordica charantia





Andrographis paniculata





Vetiveria zizanioides





Cyperus rotandus





Terminalia chebula





Solanum trilobatum





Picrrorizha kurora





Table 1: List of medicinal plant with toxicity properties.

Recent opportunistic infection: Mucormycosis

  Coronavirus 2 (SARS-CoV-2) has recently been linked to a variety of opportunistic bacterial and fungal illnesses. Recently, India has been battling covid 19 as well as fungal infections, with illness and fatality rates growing day by day. This is a nightmare for scientists and other clinicians working on medicine development and illness control. Mucormycosis is most common in those who have health difficulties, diabetes, or who are immunocompromised. Paltauf initially identified phycomycosis or zygomycosis in 1885, and Baker, an American pathologist, created the term Mucormycosis in 1957 to characterise an aggressive Rhizopus infection [35].

Black fungus

  Mucormycosis is a serious but rare fungal infection caused by a group of molds called mucormycetes. These molds live throughout the environment. Mucormycosis, an angioinvasive disease caused by mold fungi of the genus Rhizopus, Mucor, Rhizomucor, Cunninghamella and Absidia [36].

  In the current situation, the globe has begun to declare a "black fungus" epidemic, with incidences of the lethal uncommon illness increasing in people recuperating from Covid-19 infection. Mucormycosis is a fungal illness that has a 50% death rate.

  The Mucormycosis usually it often affects people in the nose first, and then spreads to the eyes. It is typically a rare disease; however it is now a prevalent opportunistic infection among patients with covid-19. Hence, current meta-data analysis more than 7,200 persons in India have been diagnosed with mucormycosis and 219 patients are died. There have been no research activities done to prove the infectious agents. The surge in black fungus infections has been related to an overuse of steroids in the treatment of the coronavirus, which can severely impair the immune system if taken for an extended length of time.

  The guardian news reported on 21 may, 2021 that the mould enters the body and then appears around the nose and eye sockets, blackening the nose, and eventually moving fatally into the brain if not halted. The fungus can typically be fought off by healthy people, but it can spread quickly in those aged and weakened immune systems ( Globally, many researchers and physicians searched for the drug to control and eradicate the black fungus. Recently, one the leading pharmaceutical company Genetik Lifesciences, based in Wardha, gained FDA approval to make the Amphotericin B injectable for black fungus infection for COVID-19 patients published on Swarajya magazine on May 15, 2021 (

Yellow fungus

  Another mould suspected of infecting COVID 19 patients is Aspergillus niger. It's a common mould that can be found both indoors and out. This fungal infection would be lethal in immunocompromised people. Invasive infections are increased by neutropenia and/or corticosteroid therapy, Aspergillus fumigatus accounts for majority of it. Inhalation of airborne conidia is the mode of transmission [37]. Aspergillus niger after transmission binds to fibrinogen and laminin in the alveolar basement membrane. Even though the macrophages in the human immune system can swallow and kill conidia; the fungi releases gliotoxin, that helps the organism evade phagocytosis. However, Neutrophils can cling to hyphae and destroy them. In condition neutrophils are overwhelmed by hyphae, leads to infiltration of pulmonary and vascular tissue, causing thrombosis and necrosis, as well as hematogenous dissemination (to other organs including brain). The fungal infection will harm the lungs and other organs in immunocompromised patients, resulting in invasive aspergillosis, a fungal disease [38].

White fungus

  Another growing opportunistic infection in COVID19 patients is Candida auris. The origins of this fungal outbreak, according to the CDC, could be attributable to changes in normal infection control methods during the COVID-19 pandemic, such as reduced availability of gloves and gowns, or reuse of these items, as well as changes in cleaning and disinfection techniques. The infection's symptoms differ depending on where Candida auris is found in the body. It can appear in a number of locations, including an open wound, the bloodstream, or the ear. Fever and chills are common symptoms [39].

Risks and control measures

  The risk of mucormycosis, covid infection in diabetic patients, the use of high steroids during Covid-19 treatments, and the use of humidified oxygen to COVID-19 patients on ventilators in intensive care units are all possibilities [40]. Precautions should be required to maintain a normal blood sugar level, and physicians should avoid overusing steroids to treat 19 individuals' with signs of infection (Figure 2).

Figure 2: Signs of Infection and Precaution Mode for Mucormycosis.

Medicinal plant for fungal infection

  Gymnema sylvestre is a traditional medicinal plant of Apocynaceae family, which is widely utilised in Ayurvedic medicine [41]. The plant has a wide spectrum of medicinal characteristics that are used to treat diabetes, diuretic, anemia, osteoporosis, hypercholesterolemia, arthritis, cardiopathy, asthma, viral and fungal infections, constipation and an anti-inflammatory agent [42]. Gymnemic acids' is the bioactive component of the plant Gymnema sylvestre, a triterpenoid saponins, which interact and inhibit illness [43]. The plant has proven efficacy against the C. albican, the now emerging fatal opportunistic infection of coronavirus. The systemic infection by C. albican involves the transition from yeast or pseudohyphal states to the hyphal growth state. This transitioned form causes a more deep infection and evades the immune system [44]. Gymnema sylvestre plant phytochemicals, Gymnemic acids' exhibited a strong inhibitory action of the critical hyphae transition in C. albican and also exerted the inhibitory action in non-mammalian model infected with Candida. The inhibitory action was also effective in serum containing medium and also the plant molecules was non-toxic to worms and mammalian cells. Additionally, the plant molecules also exhibited growth inhibitory action against another virulent opportunistic infection, Aspergillus [45]. Previous research reported the significant antiinfluenza activity of gymnemic acid fractions against in mice model [46]. Secondary metabolites like alkaloids and terpenoids of medicinal plants involves in the defensing activity against some viruses HBV, HSV, Dengue, and influenza [47]. The plant Gymnema sylvestre has potential antifungal antiviral efficacy especially in serum with non-toxicity to mammalian cells can be an effective drug candidate for Coronavirus and opportunistic fungal infections (Figure 3). Previously reported synergetic compositions of some traditional medicinal plants may pose to be used against the single stranded coronavirus [48].

Figure 3: Chemical structure of Gymnemic acid (Source: Pubchem).


  India is second most infected country from COVID-19 disease. In this situation, India is fighting to use different strategies to overcome from dangerous COVID-19 pandemic. Under these circumstances, finding a medicine/drug for a lethal disease is vital in order to lower death rates and save human lives from virus and other diseases. Several medicinal plants were reported for the antiviral activities against viruses, but the medicinal plant Gymnema sylvestre has reported to have the most promising antiviral and antibacterial properties, which might be investigated further in vitro and in vivo research. In this concern, to the issues, a foremost important is to find a drug to control coronavirus spreading, the use of already available potential secondary metabolites from the Indian medicinal plants for prevention of viral based diseases and fungal based opportunistic disease through ethno-pharmacologically will lead a new path in drug development.


The authors are grateful to Bioscience Research Foundation scientists for their invaluable support with the literature review and manuscript drafting.

Conflict of Interest

The authors declare that there is no conflict of interests.


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Citation: King Solomon Ebenezer., et al. “Potential Non-toxic Indian Medicinal Plants may Use as a Traditional Medicine to Treat Covid-19 and Opportunistic Fungal Infections". Acta Scientific Pharmaceutical Sciences 5.8 (2020): 97-103.


Copyright: © 2021 King Solomon Ebenezer., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


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