Byetta also known as exenatide is a medication used in the treatment of type 2 diabetes. It is often combined with diet and exercise to control blood sugar levels. When sugar levels are left untreated, this can lead to damage to the eyes, kidney and narrow blood vessels in the heart and legs. Adequate control of blood sugar is vital if one wants to prevent complications of diabetes. Byetta works by stimulating secretion of natural substances called incretins- incretins in return stimulate insulin secretion, which lowers sugars. Byetta is only meant for treatment of type 2 diabetes. It is used in combination with other diabetic drugs.
As far as effectiveness of Byetta is concerned, the reports are not so great. Byetta often fails to work in obese people and in those who have developed insulin resistance. Byetta is also a very expensive drug. The older drugs like metformin are still better than byetta and a lot cheaper. Start exercise, eat less sugar and this will help lower your blood sugars.