Andrographis paniculata extract versus placebo in the treatment of COVID-19: a double-blinded randomized control...

Andrographis paniculata (Burm.f.) Nees has been recommended to relieve symptoms and decrease the severity of COVID-19. The clinical study aimed to investigate the efficacy and safety of A. paniculata ethanolic extract (APE).

The efficacy and safety of APE in asymptomatic or mildly symptomatic COVID-19 patients compared with placebo were investigated through a prospective, double-blind randomized control trial. Patients received APE containing 60 mg of andrographolide, three times a day for five days. WHO progression scale, COVID-19 symptoms, and global assessment evaluated the efficacy and adverse events, liver and renal functions were monitored for safety.

165 patients completed the study (83 patients in the APE group and 82 patients in the placebo group). The highest WHO progression scale was 4 and COVID-19 symptoms were significantly relieved on the last day of intervention in both groups, with no significant difference between groups. APE significantly relieved headache symptoms on day 1 and olfactory loss symptoms on day 2 compared to placebo. The global assessment showed that 80.7% of patients had total recovery after 5-day treatment with APE. Mild diarrhea was the most common side effect with a high dose that resolved within a few days. No hepatic or renal toxicity was associated with treatment.

APE at 180 mg/day for 5 days did not reduce COVID-19 progression in asymptomatic or mildly afflicted COVID-19 patients, however, it shortened the symptoms of olfactory loss with no adverse effects over 5 days of use.