Technically, for Metformin, the use they're recommending is for preventing long COVID before it starts, not for symptom reduction in already sick people.We've just had a negative trial for one of those! (Thread)
Metformin is regularly approved for the treatment of type 2 diabetes, particularly in overweight patients. Off-label, the drug can now be used for the prophylaxis of long/post-COVID-19. This is possible within 3 days of diagnosis of an acute SARS-CoV-2 infection in adults and adolescents aged 16 years and older who have the risk factor "overweight/obesity (BMI >25)" and whose COVID-19 symptoms have been present for less than 7 days.