The effects of Bydureon were first tested in experimental models before being studied in humans.
Bydureon was investigated in four main studies lasting six months or more involving a total of 1,525 patients with type 2 diabetes. Two of the studies (555 patients) compared Bydureon with a medicine containing exenatide given twice daily, as add-on treatment to oral antidiabetes medicines or diet and exercise alone. One study (514 patients) compared Bydureon with sitagliptin or pioglitazone (a thiazolidinedione) as add-on treatment to metformin. The other study (456 patients) compared Bydureon with insulin glargine as add-on treatment to metformin with or without a sulphonylurea.
In all of the studies, the main measure of effectiveness was the change in the levels of a substance in the blood called glycosylated haemoglobin (HbA1c), which gives an indication of how well the blood glucose is being controlled. At the start of the studies, the patients? HbA1c levels were around 8.4%.