Study of Oral High/Low-dose Cepharanthine Compared With Placebo in Non Hospitalized Adults With COVID-19

Low-dose: Day 1\~5: 20mg, Q8H X 5 days (60mg/day)+SMT

"Day 1\~5: placebo+SMT~SMT:standardized medical treatment according to Scheme for Diagnosis and Treatment of 2019 Novel Coronavirus Pneumonia (The 9th Trial Edition) from health commission of China, including bed rest, adequate energy and nutrition, pay attention to water and electrolyte balance to maintain a stable internal environment, closely monitor, antiviral drug and Chinese medicine treatment, etc."

"High-dose: Day 1\~5: 40mg, Q8H X 5 days (120mg/day) +SMT~SMT:standardized medical treatment according to Scheme for Diagnosis and Treatment of 2019 Novel Coronavirus Pneumonia (The 9th Trial Edition) from health commission of China, including bed rest, adequate energy and nutrition, pay attention to water and electrolyte balance to maintain a stable internal environment, closely monitor and Chinese traditional medicine, etc."