“The cumulative incidence of long COVID by day 300 in those who took a 14-day course of metformin was 6.3% (95% confidence interval [CI], 4.2 to 8.2) compared to 10.4% (7.8 to 12.9) in the placebo group, or 39.4% lower.”
A 14-day course of metformin cut long COVID from 10.4% to 6.3% in a 1,200-person phase 3 trial. Started within three days of symptoms, the risk dropped 63%. Ivermectin and fluvoxamine did nothing. It took a university trial to find it, because nobody gets rich selling a cheap generic diabetes pill.