Diabetes is a condition that keeps your body from making enough insulin. Insulin is a hormone that's made by an organ called the pancreas. When the body doesn't make enough insulin, sugar builds up in the blood instead of moving to cells and being used for energy. This causes blood sugar to be high. If blood sugar stays high for a long time, it can cause serious health problems – including blindness, kidney damage, heart disease and stroke. That's why it's important to take medicine that helps lower blood sugar levels. Diabetes can be managed so you can live a normal, healthy life. All diabetes drugs work to lower the levels of sugar in the blood. There are two basic types of diabetes drugs: pills by mouth and shots injected into the skin. More than one drug is often needed to manage diabetes. Some people try different pills, take more than one pill, or take a pill along with shots.