To study if early initiation of inhaled beclomethasone 1200 mcg in patients with asymptomatic, mild or moderate COVID-19 reduces disease progression to severe COVID-19.

Double-blinded, parallel-groups, randomised, placebo-controlled trial.

A hospital-based study in Sri Lanka.

Adults with asymptomatic, mild or moderate COVID-19, presenting within the first 7 days of symptom onset or laboratory diagnosis of COVID-19, admitted to a COVID-19 intermediate treatment centre in Sri Lanka between July and November 2021.

All participants received inhaled beclomethasone 600 mcg or placebo two times per day, for 10 days from onset of symptoms/COVID-19 test becoming positive if asymptomatic or until reaching primary endpoint, whichever is earlier.

Progression of asymptomatic, mild or moderate COVID-19 to severe COVID-19.

The number of days with a temperature of 38°C or more and the time to self-reported clinical recovery.

A total of 385 participants were randomised to receive beclomethasone(n=193) or placebo(n=192) stratified by age (≤60 or >60 years) and sex. One participant from each arm withdrew from the study. All participants were included in final analysis. Primary outcome occurred in 24 participants in the beclomethasone group and 26 participants in the placebo group (RR 0.90 ; p=0.763). The median time for self-reported clinical recovery in all participants was 5 days (95% CI 3 to 7) in the beclomethasone group and 5 days (95% CI 3 to 8) in the placebo group (p=0.5). The median time for self-reported clinical recovery in patients with moderate COVID-19 was 5 days (95% CI 3 to 7) in the beclomethasone group and 6 days (95% CI 4 to 9) in the placebo group (p=0.05). There were no adverse events.

Early initiation of inhaled beclomethasone in patients with asymptomatic, mild or moderate COVID-19 did not reduce disease progression to severe COVID-19.

Sri Lanka Clinical Trials Registry; SLCTR/2021/017.