APD668 is shown to increase adenylate cyclase activation in HEK293 cells transfected with human GPR119 (but not in non-transfected cells) in a concentration-dependent manner with an EC50 of 23 nM. APD668 also enhanced insulin release from both rat and human isolated pancreatic islets in a glucose-dependent manner. In a standard panel of around 80 known receptors and ion channels, APD668 did not show any binding in excess of 50% of control to any other proteins at concentrations up to 10 μM.