Albiglutide is a novel analogue of glucagon-like peptide-1 (GLP-1) with a sufficiently long half-life to permit once a week injection. Currently, lyophilized albiglutide and the diluent are provided in a dual chamber cartridge (DCC), single-dose pen injector, requiring reconstitution prior to use. A liquid formulation of albiglutide will enable the commercialization of a liquid product in a single dose, ready-to-use prefilled syringe in an auto-injector.