Eligibility Criteria:
Inclusion Criteria:
* Subjects aged between 18 to 70 years,
* Patients with symptoms and complaints consistent with possible or confirmed COVID- 19 observed within the last 5 days,
* Patients with uncomplicated possible or confirmed COVID-19:
1. Symptoms such as fever, muscle aches, joint pain, cough, sore throat, nasal congestion, however no respiratory distress, no tachypnea or no SpO2 \< 93%,
2. Chest imaging (X-ray or CT chest) documented as normal
* Patients with mild possible or confirmed COVID-19 pneumonia (no severe pneumonia symptoms):
1. Symptoms such as fever, muscle aches, joint pain, cough, sore throat, nasal congestion, as well as respiratory rate \<30/min and SpO2 above 93% on room air,
2. Chest imaging (X-ray or CT chest)-documented mild pneumonia symptoms
* Patients who were decided to isolate and treat because of COVID-19 in the hospital,
* Patients who have not been involved in any other interventional studies.
Exclusion Criteria:
* Patients considered as inappropriate for this study for any reason like noncompliance by the researcher,
* Patients with persisting refractory nausea, vomiting, chronic diarrhoea or chronic gastrointestinal disorders, inability to swallow the study drug which may affect adequate absorption,
* Patients with chronic liver disease: alanine aminotransferase (ALT)/aspartate aminotransferase (AST) elevated over 5 times the upper limit of normal (ULN),
* Patients with gout or hyperuricemia (above the ULN),
* Patients with severe pneumonia symptoms,
* Patients with known allergy to Favipiravir or for substances used in the study,
* Patients did not receive specific antiviral drugs such as lopinavir/ritonavir, ribavirin, arbidol, chloroquine phosphate, hydroxychloroquine, and monoclonal antibodies within one week before admission.
* Patients with known chronic renal impairment/failure \[creatinine clearance (CcCl) \<30 mL/min\],
* Pregnant and lactating women
* Patients undergoing cardiac ablation therapy
* Patients using antiarrhythmic drugs
* Patients actively receiving chemotherapy
* Acute immunosuppressed patients
* Patients undergoing psychosis therapy