Common medicines used to control diabetes include tablets like Metformin, Glimepiride, and Sitagliptin, which help lower blood sugar levels in people with type 2 diabetes. In some cases, doctors may also prescribe Insulin injections if blood sugar is not well controlled with tablets. The exact medicine depends on your blood sugar levels, age, and overall health, so it is important to take diabetes medicines only under a doctor?s guidance, along with a healthy diet, regular exercise, and routine monitoring of blood glucose.