inclusion criteria: 1. adults aged ≥ 18 years (maximum 65 years old in india). 2. laboratory-confirmed diagnosis of sars-cov-2 infection within 10 days prior to randomisation. (confirmation must be through reverse transcription polymerase chain reaction \[rt-pcr\] method) 3. intended for hospital admission for management of covid-19. 4. patients with moderate (respiratory rate of ≥ 24/minute or spo2: 90% to ≤ 93% on room air) or severe (respiratory rate of ≥ 30/minute or spo2: \<90% on room air) covid-19. 5. systolic blood pressure (sbp) ≥ 120 mmhg or sbp ≥ 115 mmhg and currently treated with a non-raasi bp lowering agent that can be ceased. 6. willing and able to comply with all study requirements, including treatment, timing and/or nature of required assessments. 7. documented informed consent.

inclusion criteria: 1. adults aged ≥ 18 years (maximum 65 years old in india). 2. laboratory-confirmed diagnosis of sars-cov-2 infection within 10 days prior to randomisation. (confirmation must be through reverse transcription polymerase chain reaction \[rt-pcr\] method) 3. intended for hospital admission for management of covid-19. 4. patients with moderate (respiratory rate of ≥ 24/minute or spo2: 90% to ≤ 93% on room air) or severe (respiratory rate of ≥ 30/minute or spo2: \<90% on room air) covid-19. 5. systolic blood pressure (sbp) ≥ 120 mmhg or sbp ≥ 115 mmhg and currently treated with a non-raasi bp lowering agent that can be ceased. 6. willing and able to comply with all study requirements, including treatment, timing and/or nature of required assessments. 7. documented informed consent.

inclusion criteria: adults aged ≥ 18 years (maximum 65 years old in india). laboratory-confirmed diagnosis of sars-cov-2 infection within 10 days prior to randomisation. (confirmation must be through reverse transcription polymerase chain reaction [rt-pcr] method) intended for hospital admission for management of covid-19. patients with moderate (respiratory rate of ≥ 24/minute or spo2: 90% to ≤ 93% on room air) or severe (respiratory rate of ≥ 30/minute or spo2: <90% on room air) covid-19. systolic blood pressure (sbp) ≥ 120 mmhg or sbp ≥ 115 mmhg and currently treated with a non-raasi bp lowering agent that can be ceased. willing and able to comply with all study requirements, including treatment, timing and/or nature of required assessments. documented informed consent.

inclusion criteria: adults aged ≥ 18 years (maximum 65 years old in india). laboratory-confirmed diagnosis of sars-cov-2 infection within 10 days prior to randomisation. (confirmation must be through reverse transcription polymerase chain reaction [rt-pcr] method) intended for hospital admission for management of covid-19. patients with moderate (respiratory rate of ≥ 24/minute or spo2: 90% to ≤ 93% on room air) or severe (respiratory rate of ≥ 30/minute or spo2: <90% on room air) covid-19. systolic blood pressure (sbp) ≥ 120 mmhg or sbp ≥ 115 mmhg and currently treated with a non-raasi bp lowering agent that can be ceased. willing and able to comply with all study requirements, including treatment, timing and/or nature of required assessments. documented informed consent.