Abstract
COVID-19, a severe global catastrophe spread by the corona-virus which causes severe acute respiratory syndrome (SARS-CoV-2) has emerged as one of the most dangerous transmitted diseases. Natural products and their use in respiratory infections with low toxicity is seen. In the present scenario health care system is turning to medicinal plant products. Herbal medicine includes multiple active constituents for a variety of diseases, but proper information is needed for the preparation of herbal regimens; otherwise, active constituents would be negatively affected. So this keep in mind, Standardization parameter like ash value, acid insoluble value, acid value saponification value is discussed here. Ayurvedic Formulation like Aswagandha, Giloy, Tulsi, Neem, clove, pepper, Licorice is standardized for their quality, purity, inorganic content and lack of chemical constituents which causes severe problem after administration. Many preclinical and clinical trials conducted to evaluate the effect of herbal drugs which can cure and prevent the COVID-19. The herbal constituent extracted from different plant part is standardized like stem, root, leaves for their qualitative analysis which is effective against COVID-19. This review article discussing about the quality and purity and tell about the pros and cons of the herbal drug and its effect.
The use of herbal drug for Ayurvedic formulation show potent effect for mild, moderate and severe effect of COVID-19 , inflammation ,respiratory distress , cough , cold and loss of senses . Some Ayurvedic formulation which is present in market is guduchi, giloy ghanvati, tulsi ghanvati, neem ghanvati, aswagandha ghanvati, yasthimadhu, laxmivilas rasa, sudarshan ghanvati etc . Which is having great effect in these type of COVID-19 symptoms.

Key words: Covid 19, Ayurvedic Treatment, herbal formulation, Phytochemical constituents , SARS-CoV-2