Sitaliptin 100/500 Tablet  is a combination of two medicines that control high blood sugar levels in people with type 2 diabetes mellitus. This helps prevent serious complications of diabetes, such as kidney damage and blindness and may reduce your chances of having a heart attack or stroke. Sitaliptin 100/500 Tablet may be prescribed alone or along with other diabetes medications. It works best when used along with a healthy diet and regular exercise. Your dose will depend on your condition, blood sugar levels, and other medicines you are taking. Taking it with meals helps to reduce the chances of developing an upset stomach. To get the most benefit, you should take it regularly, at the same time each day, and you should not stop unless your doctor recommends it. It is important to stay on the diet and exercise program recommended by your doctor while taking this medicine. Your lifestyle plays a big part in controlling diabetes. The most common side effects of taking Sitaliptin 100/500 Tablet include diarrhea, upper respiratory tract infection, and headache. Low blood sugar level (hypoglycemia) is a possible side effect if you are also taking other diabetes medicines like insulin or sulfonylurea. Hence, you need to know how to recognize and deal with it. This medicine is not suitable for everyone. Before taking it, you should let your doctor know if you have ever had kidney, liver, or heart disease, problems with your pancreas, or if you drink a lot of alcohol. Pregnant or breastfeeding women should also consult their doctor before taking this medicine. Some other medicines may affect Sitaliptin 100/500 Tablet , so tell your doctor about all the other medicines you are taking to ensure you are safe. You should try to avoid drinking alcohol as it lowers blood glucose. Your doctor will check your kidney function and blood sugar levels before and during treatment.