Incidence of symptomatic hypotension or hypotension requiring cessation of prazosin;Hospitalized, requiring supplemental oxygen, not requiring ICU/CCU level care (or interventions listed under Outcome 2);Cumulative incidence of grade 3 and 4 adverse events;Number of participants with serious adverse events;Hospitalized, requiring mechanical ventilation and/or high flow nasal cannula and/or ICU/CCU admission (or equivalent) and/or ECMO;Death

Incidence of symptomatic hypotension or hypotension requiring cessation of prazosin;Hospitalized, requiring supplemental oxygen, not requiring ICU/CCU level care (or interventions listed under Outcome 2);Cumulative incidence of grade 3 and 4 adverse events;Number of participants with serious adverse events;Hospitalized, requiring mechanical ventilation and/or high flow nasal cannula and/or ICU/CCU admission (or equivalent) and/or ECMO;Death