Patient description: The patient is a 24-year-old man who has had type 1 diabetes for 11 years. He presents to the emergency room with hyperglycemia and concern for possible diabetic ketoacidosis after not taking his insulin for 3 days. The patient reports that he is currently homeless and has lost his supply of insulin, syringes, glucometer, and glucose testing supplies. The patient states that at the time of his initial diagnosis with type 1 diabetes he was hospitalized with a glucose value >1000 mg/dL. At the time, he was experiencing polyuria, polydipsia, and polyphagia. He reports that he has been on insulin since the time of his diagnosis, and he has never been prescribed oral agents for diabetes management. Most recently, he has been using insulin glargine 55 units once daily, and insulin aspart sliding scale 3 times daily. The patient has had previous episodes of diabetic ketoacidosis, for which he was hospitalized. With this episode of hyperglycemia, he is not experiencing any nausea, vomiting, or abdominal discomfort, and he appears well. His lab studies showed: A1c: 11.3% Creatinine: 0.9 mg/dL with eGFR >60 mL/min Aspartate aminotransferase (AST): 17 U/L Alanine aminotransferase (ALT): 14 U/L Beta-hydroxybutyrate: 0.1 mmol/L Bicarbonate: 25 mEq/L Anion

Clinical trial eligibility criteria: eligible ages (years): 18.0-80.0,  Type 2 Diabetes A known history of Type 2 Diabetes receiving either diet alone or oral antidiabetic drugs (OAD) including insulin secretagogues, pioglitazone, DPP4 inhibitors, or metformin as monotherapy or in combination therapy, or low-dose insulin at <0.5 unit/kg/day. 2. Males or females between the ages of 18 and 80 years discharged after hospital admission from general medicine and surgery services (non-Intensive Care Unit setting). 3. Subjects with an admission / randomization BG < 400 mg/dL without laboratory evidence of diabetic ketoacidosis (serum bicarbonate < 18 mEq/L or positive serum or urinary ketones). 4. Admission HbA1c between 7% and 10% 5. BMI range: > 25 Kg/m^2 and < 45 Kg/m^2  Age < 18 or > 80 years 2. Subjects with increased blood glucose (BG) concentration, but without a history of diabetes (stress hyperglycemia) 3. Subjects with a history of type 1 diabetes (suggested by BMI < 25 Kg/m^2 requiring insulin therapy or with a history of diabetic ketoacidosis and hyperosmolar hyperglycemic state, or ketonuria). 4. Treatment with high-dose (>0.5 unit/kg/day) insulin or with GLP-1 RA during the past 3 months prior to admission. 5. Patients that required ICU care during the hospital admission. 6. Recurrent severe hypoglycemia or hypoglycemic unawareness. 7. Subjects with gastrointestinal obstruction, gastroparesis, history of pancreatitis or those expected to require gastrointestinal suction. 8. Patients with clinically relevant pancreatic or gallbladder disease. 9. Patients with unstable or rapidly progressing renal disease or severe renal impairment (creatinine clearance < 30 ml/min) 10. Patients with clinically significant hepatic disease (cirrhosis, jaundice, end-stage liver disease), 11. History of hypersensitivity to exenatide 12. Treatment with oral or injectable corticosteroid (equal to a prednisone dose >5 mg/day), parenteral nutrition and immunosuppressive treatment. 13. Patients with history of heavy alcohol use (female > 2 drinks per day, male > 3 drinks per day) or drug abuse within 3 months prior to admission. 14. Mental condition rendering the subject unable to understand the nature, scope, and possible consequences of the study. 15. Female subjects who are pregnant or breast feeding at time of enrollment into the study