Metformin Hcl 500 Mg is primarily used to manage type 2 diabetes by lowering blood sugar levels. It improves insulin sensitivity and reduces glucose production in the liver. Additionally, metformin may be prescribed for polycystic ovary syndrome (PCOS) to regulate menstrual cycles and promote ovulation. It helps control weight gain associated with insulin resistance. Metformin has shown potential in other conditions like gestational diabetes and non-alcoholic fatty liver disease (NAFLD). However, it's crucial to use metformin under medical supervision, as it may cause side effects such as gastrointestinal discomfort or lactic acidosis in rare cases.