- Treatment with the following medications: *Insulin as outpatient therapy within last 3 months; *Meglitinides, or acarbose within the last 3 months; *Regular use of any drugs that directly affect gastrointestinal motility; *Any previous (study) therapy with exenatide or glucagon-like peptide-1 (GLP-1) analogue; *Anti-obesity agent use within the last 3 months.