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The goals of diabetes treatment are to keep blood glucose within normal range and to prevent long-term complications. Why control blood glucose? In the first place, diabetes can cause short-term effects: some are unpleasant and some are dangerous. These include thirst, frequent urination, weakness, lack of ability to concentrate, loss of coordination, and blurred vision. Loss of consciousness is possible with very high or low blood sugar levels, but is more of a danger in insulin-dependent than in noninsulin-dependent diabetes.
In the second place, the long-term complications of diabetes may result from many years of high blood glucose. Research is under way to find out if this is true and to learn if careful control can help prevent complications. Meanwhile, most doctors feel that if people with diabetes keep their blood glucose levels under control, they will reduce the risk of complications.
In 1986, a National Institutes of Health panel of experts recommended that the best treatment for noninsulin-dependent diabetes is a diet that helps the person maintain normal weight. In people who are overweight, losing weight is the one treatment that is clearly effective in controlling diabetes.
In some people, exercise can help keep weight and diabetes under control. However, when diet and exercise alone can't control diabetes, two other kinds of treatment are available: oral diabetes medications and insulin. The treatment a doctor suggests depends on the person's age, lifestyle, and the severity of the diabetes.