Diabetology for primary health care – the use of metformin in the treatment of prediabetes, primary prevention and secondary prevention in type 2 diabetes

The 2021 guidelines on the management of diabetes by the Polish Diabetes Association introduce the new criterion for the diagnosis of diabetes – percentage of glycated hemoglobin HbA1c > 6.5%. This is important, especially now, during the COVID-19 epidemic, for patients with diagnosed pre-diabetes who are already using metformin, as it allows to release the need for an oral glucose tolerance test. The article describes the principles of using metformin in the prevention of type 2 diabetes.