After being informed about the study and potential risks, all patients will give written informed consent and undergo a 1 day screening period to determine the eligibility for study entry. At day 0, patients who meet the eligibility requirements will be randomized in a double blind (participant and investigator) in a 1:1 ratio to metformin glycinate (620 mg, taken orally twice daily) plus standard treatment or placebo (taken orally,twice daily) plus standard treatment, both will be for 14 days.
The purpose of this study is to evaluate the efficacy and safety of metformin glycinate at dose of 620 mg twice per day plus standard treatment comparing to standard treatment alone (we will use placebo) of patients who have metabolic syndrome or type 2 diabetes, which have severe acute respiratory syndrome secondary to SARS-CoV-2.