Patients and Methods: Hospitalized elderly patients with CAP (diagnosed by using defined clinical and radiological criteria) were randomized to receive oral CoQ10 (200 mg/d) or placebo for 14 days, along with antibiotics. Primary and secondary outcomes on days 3, 7, and 14 were measured. Disease severity was scored using CURB-65 index. Statistical analysis was performed using SPSS and P value < 0.05 was considered significant.