Safety and Efficacy of Medications COVID-19

The 4 successive study time periods spanned from March 2020 to April 2021 and included: 1) standard of care (SOC) (C1), 2) SOC + oral bedtime melatonin (OBM) (T1), 3) SOC (C2), and 4) SOC + OBM (T2). During T1, 3 consecutive subgroups received 50 mg, 100 mg and 200 mg OBM. During T2, 100 mg OBM was given. Melatonin was administered from ICU admission to hospital discharge or death. The main objectives were occurrence of predefined severe adverse events (SAEs), Sequential Organ Failure Assessment (SOFA) scores and day-30 (D30) and 90 (D90) mortality. Study subjects were followed for modified Rankin scale (mRS) at 30 days after the last OBM dose or hospital discharge.