GCG and ileus: With regard to other established and putative adverse events associated with the use of incretin analogs [3,143,144,145], the studies examined in this review did not report cases of acute kidney injury, retained gastric contents, aspiration pneumonia, cholecystitis, cholelithiasis, biliary obstruction, ileus, neuropsychiatric events, sarcopenia, leukocytoclastic vasculitis, dermal hypersensitivity reactions, systemic allergic reactions, pancreatitis, or development/worsening of retinopathy.