GLP1R and type 2 diabetes mellitus: Several new classes of drugs used to manage type 2 diabetes have entered the market over the last two decades, including dipeptidyl peptidase-4 inhibitors (DPP-4i), sodium-glucose co-transporter-2 inhibitors (SGLT-2i), and glucagon-like peptide-1 receptor agonists (GLP-1 RAs).