Abstract
Background:
Ayush (Ayurveda, Yoga and Naturopathy, Unani, Siddha, and Homeopathy) system of medicine has been extensively used in India for the prevention and management of coronavirus disease 2019 (COVID-19). The present report is the second update of a living systematic review and meta-analysis and has been intended to assess the preventive potential and safety of Ayush drugs against COVID-19.
Methods:
A search of databases such as PubMed, the Cochrane central register of controlled trials, the World Health Organization (WHO) COVID-19 database, the clinical trial registry-India, the AYUSH research portal, and preprint repositories was performed till March 1, 2023. Randomized controlled trials or analytical observational studies were included. Incidences of COVID-19 infections and mortality were taken as primary outcome measures; and symptomatic severe acute respiratory syndrome corona virus 2 (SARS-CoV-2) infection, incidences of hospital admissions, and adverse events were taken as secondary outcomes. The risk of bias was evaluated by version 2 of the Cochrane risk-of-bias tool for randomized trials (RoB-2) and the Risk of Bias in Non-Randomized Studies-of Interventions (ROBINS-I) tool. Data were synthesized through the RevMan 5.4 tool, and the certainty of the evidence was ranked through the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) approach.
Results:
Out of 2350 articles, 15 studies were included in the review. The pooled estimate of Guduchi [Tinospora cordifolia (Thunb.) Miers], Chyawanprasha, and Ayuraksha kit was obtained. Meta-analysis of the data suggested that Guduchi may reduce the incidences of COVID-19 infections (risk ratio [RR]: 0.67 [95% confidence interval, CI: 0.48–0.95]) and the symptom development among the infected (RR: 0.88 [95% CI: 0.73–1.08]), however, no change was observed in hospital admissions (RR: 0.96 [95% CI: 0.20–4.53]). It is uncertain that Chyawanprasha reduces the incidence of COVID-19 infection (RR: 0.28; [95% CI: 0.07–1.08]). Ayuraksha kit as chemoprophylaxis may reduce the incidences of COVID-19 infections (RR: 0.49; [95% CI: 0.32–0.77]). The certainty of the evidence was low to moderate mainly due to the serious risk of bias.
Conclusion:
Prophylactic use of Ayush medicines for populations at risk may help to prevent COVID-19 infection by reducing incidence and severity. However, considering the certainty and fewer studies, high-quality studies are still desired to confirm the efficacy and safety of Ayush chemoprophylaxis for COVID-19. Nevertheless, this update will serve as a torchbearer for policymakers, physicians, and other stakeholders for their decision-making through evidence-based medicine.
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