Abstract: This invention relates to modified Vasoactive Intestinal Peptide (VIP)/Pituitary Adenylate Cyclase Activating Peptide (PACAP) Receptor 2 (VPAC2) agonists (VPAC2 agonists) comprising a VPAC2 agonist linked to a polyethylene glycol polymer, as well as related formulations, dosages, and methods of administration thereof for therapeutic purposes. These VPAC2 agonists, compositions, and methods are useful in providing a treatment option for those individuals afflicted with a metabolic disorder such as diabetes, impaired glucose tolerance, metabolic syndrome, or prediabetic states, by inducing glucose-dependent insulin secretion in the absence of the therapeutically limiting side effect of reducing or lowering blood pressure.